diff --git a/release-assistant/javcra/application/checkpart/check_requires/__init__.py b/release-assistant/javcra/application/checkpart/check_requires/__init__.py
new file mode 100644
index 0000000000000000000000000000000000000000..e82e06ac13296779ad587341849e0bd7378158b2
--- /dev/null
+++ b/release-assistant/javcra/application/checkpart/check_requires/__init__.py
@@ -0,0 +1,14 @@
+#!/usr/bin/python3
+# ******************************************************************************
+# Copyright (c) Huawei Technologies Co., Ltd. 2020-2020. All rights reserved.
+# licensed under the Mulan PSL v2.
+# You can use this software according to the terms and conditions of the Mulan PSL v2.
+# You may obtain a copy of Mulan PSL v2 at:
+#     http://license.coscl.org.cn/MulanPSL2
+# THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND, EITHER EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT, MERCHANTABILITY OR FIT FOR A PARTICULAR
+# PURPOSE.
+# See the Mulan PSL v2 for more details.
+# Author: DisNight
+# Create: 2021-06-29
+# ******************************************************************************/
\ No newline at end of file
diff --git a/release-assistant/javcra/application/checkpart/check_requires/get_effected_rpms.py b/release-assistant/javcra/application/checkpart/check_requires/get_effected_rpms.py
new file mode 100644
index 0000000000000000000000000000000000000000..d0b71e4eadbf8bab61970c54228e3b5d1b7fd105
--- /dev/null
+++ b/release-assistant/javcra/application/checkpart/check_requires/get_effected_rpms.py
@@ -0,0 +1,62 @@
+#!/usr/bin/python3
+# ******************************************************************************
+# Copyright (c) Huawei Technologies Co., Ltd. 2020-2020. All rights reserved.
+# licensed under the Mulan PSL v2.
+# You can use this software according to the terms and conditions of the Mulan PSL v2.
+# You may obtain a copy of Mulan PSL v2 at:
+#     http://license.coscl.org.cn/MulanPSL2
+# THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND, EITHER EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT, MERCHANTABILITY OR FIT FOR A PARTICULAR
+# PURPOSE.
+# See the Mulan PSL v2 for more details.
+# Author: DisNight
+# Create: 2021-06-24
+# ******************************************************************************/
+
+
+def get_whatrequires(
+    pkg_list: list,
+    published_repos: list,
+    dev_repos: list,
+    branch: str = "openEuler:20.03:LTS:SP1",
+) -> dict:
+    """
+    get effected src rpm list which requires rpm in pkg_list
+
+    Attributes:
+        pkg_list: source rpm list
+        published_repos: published repo name list in /etc/yum.repo.d/xxx.repo (repo.openuler.org/xxx etc.)
+        dev_repos: develop repo name list in /etc/yum.repo.d/xxx.repo (obs.repo/xxxx etc.)
+        branch: branch in obs proj such as (openEuler:20.03:LTS:SP1, openEuler:20.03:LTS:SP1:EPOL, etc.)
+
+    return:
+        pkg_dict = {
+            src_rpm: [bin_rpm],
+            ...
+        }
+    """
+    pass
+
+
+def get_update_install(
+    pkg_list: list,
+    published_repos: list,
+    dev_repos: list,
+    branch: str = "openEuler:20.03:LTS:SP1",
+) -> dict:
+    """
+    get effected src rpm list which requires rpm in pkg_list
+
+    Attributes:
+        pkg_list: source rpm list
+        published_repos: published repo name list in /etc/yum.repo.d/xxx.repo (repo.openuler.org/xxx etc.)
+        dev_repos: develop repo name list in /etc/yum.repo.d/xxx.repo (obs.repo/xxxx etc.)
+        branch: branch in obs proj such as (openEuler:20.03:LTS:SP1, openEuler:20.03:LTS:SP1:EPOL, etc.)
+
+    return:
+        pkg_dict = {
+            src_rpm: [bin_rpm],
+            ...
+        }
+    """
+    pass
diff --git a/release-assistant/javcra/application/checkpart/check_requires/init_env.py b/release-assistant/javcra/application/checkpart/check_requires/init_env.py
new file mode 100644
index 0000000000000000000000000000000000000000..cbba2d854225f7622d9b1758628d7dc2d7c5c7a5
--- /dev/null
+++ b/release-assistant/javcra/application/checkpart/check_requires/init_env.py
@@ -0,0 +1,174 @@
+#!/usr/bin/python3
+# ******************************************************************************
+# Copyright (c) Huawei Technologies Co., Ltd. 2020-2020. All rights reserved.
+# licensed under the Mulan PSL v2.
+# You can use this software according to the terms and conditions of the Mulan PSL v2.
+# You may obtain a copy of Mulan PSL v2 at:
+#     http://license.coscl.org.cn/MulanPSL2
+# THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND, EITHER EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT, MERCHANTABILITY OR FIT FOR A PARTICULAR
+# PURPOSE.
+# See the Mulan PSL v2 for more details.
+# Author: DisNight
+# Create: 2021-06-24
+# ******************************************************************************/
+
+import os
+import yaml
+import logging
+
+from yaml.error import YAMLError
+from javcra.libs.config.global_config import (
+    SUCCEED,
+    FAILED,
+    DEFAULT_OSCRC_APIURL,
+    DEFAULT_OSCRC_POSITION,
+    OSCRC_TEMPLETE,
+    OSCRC_USER_FLAG,
+    OSCRC_PASS_FLAG,
+    OSCRC_APIURL_FLAG,
+    OPENEULER_BRANCH_MAP,
+    SUPPORTED_BRANCHES_LIST,
+    YUM_REPO_TEMPLETE_FOLDER,
+)
+
+
+def init_oscrc(
+    user: str,
+    pswd: str,
+    apiurl: str = DEFAULT_OSCRC_APIURL,
+    oscrc: str = DEFAULT_OSCRC_POSITION,
+    osc_templete: str = OSCRC_TEMPLETE,
+) -> int:
+    """
+    init osc config file oscrc
+
+    Attributes:
+        user: username of obs account
+        pass: password of obs account
+        apiurl: remote of obs server
+        oscrc: the position of oscrc file
+        osc_templete: the position of oscrc templete
+
+    return:
+        finish_code:
+            succeed : 0
+            failed  : 1
+    """
+    if os.path.exists(oscrc):
+        logging.info("%s exist, skip init step", oscrc)
+        return SUCCEED
+    if not os.path.exists(osc_templete):
+        logging.error("init oscrc failed: %s templete not exist", osc_templete)
+        return SUCCEED
+    oscrc_data = ""
+
+    # scanf format templete from file
+    try:
+        with open(osc_templete, "r") as f:
+            oscrc_data = f.read()
+    except UnicodeDecodeError as ude:
+        logging.error("init oscrc failed: %s", str(ude))
+        oscrc_data = ""
+    if not oscrc_data:
+        logging.error("cannot scan data from oscrc.template")
+        return FAILED
+
+    oscrc_data = oscrc_data.replace(OSCRC_USER_FLAG, user)
+    oscrc_data = oscrc_data.replace(OSCRC_PASS_FLAG, pswd)
+    oscrc_data = oscrc_data.replace(OSCRC_APIURL_FLAG, apiurl)
+
+    try:
+        with open(oscrc, "a") as f:
+            f.write(oscrc_data)
+    except UnicodeEncodeError as uee:
+        logging.error("init oscrc failed: %s", str(uee))
+        _ = os.path.exists(oscrc) and os.remove(oscrc)
+
+    if not os.path.exists(oscrc):
+        logging.warning("please init oscrc by yourself")
+        return FAILED
+    return SUCCEED
+
+
+def load_support_branch(bmap_file: str = OPENEULER_BRANCH_MAP) -> dict:
+    """
+    load supported branch from configure file(yaml)
+
+    Attributes:
+        bmap_file: supported_branch.yaml
+
+    return:
+        dict bmap: {
+            <obs project name> : <supported branch>,
+            ......
+        }
+    """
+    # load support branch map from config file
+    temp_map = {}
+    try:
+        with open(bmap_file, "r") as f:
+            temp_map = yaml.safe_load(f)
+    except YAMLError as ye:
+        logging.error("load branch map error: %s", str(ye))
+        temp_map = {}
+    if not temp_map:
+        return temp_map
+
+    # parse yaml format to  gitee_branch_name:obs_project_name
+    bmap = {}
+    for support_branch in SUPPORTED_BRANCHES_LIST:
+        for bname in temp_map.get(support_branch, []):
+            if not temp_map[support_branch][bname].get("obs_alias", ""):
+                continue
+            bmap[bname] = temp_map[support_branch][bname]["obs_alias"]
+    return bmap
+
+
+def get_yum_repo_file(branch: str, bmap_file: str = OPENEULER_BRANCH_MAP) -> str:
+    """
+    get specified branch's yum repo file
+
+    Attributes:
+        branch: branch in gitee or project name in obs
+        bmap_file: supported_branch.yaml
+
+    return:
+        yum_repo_file:
+            the specified branch's yum repo file
+    """
+    if not branch:
+        logging.warning("branch is empty, skip this step")
+        return ""
+    bmap = load_support_branch(bmap_file)
+    yum_repo_file = ""
+    if not bmap:
+        logging.warning("can not find specify branch, use local yum repo file")
+        return ""
+    key_list = list(bmap.keys())
+    val_list = list(bmap.values())
+    if branch in key_list:
+        yum_repo_file = os.path.join(YUM_REPO_TEMPLETE_FOLDER, "{}.repo".format(branch))
+        if not os.path.exists(yum_repo_file):
+            logging.error(
+                "template yum repo file [%s.repo] is missing",
+                branch
+            )
+            return ""
+        return yum_repo_file
+    if branch in val_list:
+        # find key from dict by value
+        tmp_bname = key_list[val_list.index(branch)]
+        yum_repo_file = os.path.join(
+            YUM_REPO_TEMPLETE_FOLDER, "{}.repo".format(tmp_bname)
+        )
+        if not os.path.exists(yum_repo_file):
+            logging.error(
+                "template yum repo file [%s.repo] is missing",
+                branch
+            )
+            return ""
+        return yum_repo_file
+
+    logging.warning("branch [%s] is not supporter", branch)
+    return ""
diff --git a/release-assistant/javcra/libs/config/checkpart/check_requires/oscrc.templete b/release-assistant/javcra/libs/config/checkpart/check_requires/oscrc.templete
new file mode 100644
index 0000000000000000000000000000000000000000..526ca76630ea8a206cbe4dd3d0fc82df499f009b
--- /dev/null
+++ b/release-assistant/javcra/libs/config/checkpart/check_requires/oscrc.templete
@@ -0,0 +1,7 @@
+[general]
+apiurl=@APIURL@
+no_verify=1
+
+[@APIURL@]
+user=@USERNAME@
+pass=@PASSWORD@
\ No newline at end of file
diff --git a/release-assistant/javcra/libs/config/checkpart/check_requires/support_branch.yaml b/release-assistant/javcra/libs/config/checkpart/check_requires/support_branch.yaml
new file mode 100644
index 0000000000000000000000000000000000000000..84cb5b71e40eb5b7e1643f7204d22482b0df6ac3
--- /dev/null
+++ b/release-assistant/javcra/libs/config/checkpart/check_requires/support_branch.yaml
@@ -0,0 +1,5 @@
+openEuler :
+  openEuler-20.03-LTS:
+    obs_alias: "openEuler:20.03:LTS"
+  openEuler-20.03-LTS-SP1:
+    obs_alias: "openEuler:20.03:LTS:SP1"
\ No newline at end of file
diff --git a/release-assistant/javcra/libs/config/checkpart/check_requires/yum.repo/openEuler-20.03-LTS-SP1.repo b/release-assistant/javcra/libs/config/checkpart/check_requires/yum.repo/openEuler-20.03-LTS-SP1.repo
new file mode 100644
index 0000000000000000000000000000000000000000..a5436b3c5e441a2060f776e04f654d15fd123e71
--- /dev/null
+++ b/release-assistant/javcra/libs/config/checkpart/check_requires/yum.repo/openEuler-20.03-LTS-SP1.repo
@@ -0,0 +1,86 @@
+#generic-repos is licensed under the Mulan PSL v2.
+#You can use this software according to the terms and conditions of the Mulan PSL v2.
+#You may obtain a copy of Mulan PSL v2 at:
+#    http://license.coscl.org.cn/MulanPSL2
+#THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND, EITHER EXPRESS OR
+#IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT, MERCHANTABILITY OR FIT FOR A PARTICULAR
+#PURPOSE.
+#See the Mulan PSL v2 for more details.
+
+#binary repo
+ 
+[published-everything]
+name=published-everything
+baseurl=https://repo.openeuler.org/openEuler-20.03-LTS-SP1/everything/$basearch/
+enabled=1
+gpgcheck=0
+priority=2
+gpgkey=https://repo.openeuler.org/openEuler-20.03-LTS-SP1/everything/$basearch/RPM-GPG-KEY-openEuler
+
+[published-update]
+name=published-update
+baseurl=https://repo.openeuler.org/openEuler-20.03-LTS-SP1/update/$basearch/
+enabled=1
+gpgcheck=0
+priority=1
+gpgkey=https://repo.openeuler.org/openEuler-20.03-LTS-SP1/update/$basearch/RPM-GPG-KEY-openEuler
+
+[published-debuginfo]
+name=published-debuginfo
+baseurl=https://repo.openeuler.org/openEuler-20.03-LTS-SP1/debuginfo/$basearch/
+enabled=0
+gpgcheck=0
+gpgkey=https://repo.openeuler.org/openEuler-20.03-LTS-SP1/debuginfo/$basearch/RPM-GPG-KEY-openEuler
+
+[devel-obs]
+name=devel-obs
+baseurl=http://119.3.219.20:82/openEuler:/20.03:/LTS:/SP1/standard_$basearch/
+enabled=1
+gpgcheck=0
+priority=3
+
+#source repo
+
+[published-everything-src]
+name=published-everything-src
+baseurl=https://repo.openeuler.org/openEuler-20.03-LTS-SP1/source
+enabled=0
+gpgcheck=0
+gpgkey=https://repo.openeuler.org/openEuler-20.03-LTS-SP1/source/$basearch/RPM-GPG-KEY-openEuler
+
+[published-update-src]
+name=published-update-src
+baseurl=https://repo.openeuler.org/openEuler-20.03-LTS-SP1/update/source
+enabled=0
+gpgcheck=0
+gpgkey=https://repo.openeuler.org/openEuler-20.03-LTS-SP1/update/source/RPM-GPG-KEY-openEuler
+
+#EPOL binary repo
+
+[published-EPOL]
+name=published-EPOL
+baseurl=https://repo.openeuler.org/openEuler-20.03-LTS-SP1/EPOL/$basearch/
+enabled=0
+gpgcheck=0
+gpgkey=https://repo.openeuler.org/openEuler-20.03-LTS-SP1/OS/$basearch/RPM-GPG-KEY-openEuler
+
+[published-Epol-src]
+name=published-Epol-src
+baseurl=https://repo.openeuler.org/openEuler-20.03-LTS-SP1/Epol/source
+enabled=0
+gpgcheck=0
+gpgkey=https://repo.openeuler.org/openEuler-20.03-LTS-SP1/Epol/source/RPM-GPG-KEY-openEuler
+
+[published-Epol-update-src]
+name=published-Epol-update-src
+baseurl=https://repo.openeuler.org/openEuler-20.03-LTS-SP1/Epol/update/source
+enabled=0
+gpgcheck=0
+gpgkey=https://repo.openeuler.org/openEuler-20.03-LTS-SP1/Epol/update/source/RPM-GPG-KEY-openEuler
+
+[devel-obs]
+name=devel-obs
+baseurl=http://119.3.219.20:82/openEuler:/20.03:/LTS:/SP1/standard_$basearch/
+enabled=1
+gpgcheck=0
+priority=3
diff --git a/release-assistant/javcra/libs/config/checkpart/check_requires/yum.repo/openEuler-20.03-LTS.repo b/release-assistant/javcra/libs/config/checkpart/check_requires/yum.repo/openEuler-20.03-LTS.repo
new file mode 100644
index 0000000000000000000000000000000000000000..dc2b4457d31960f2fdac13ac6fa309a7ea6e1d84
--- /dev/null
+++ b/release-assistant/javcra/libs/config/checkpart/check_requires/yum.repo/openEuler-20.03-LTS.repo
@@ -0,0 +1,85 @@
+#generic-repos is licensed under the Mulan PSL v2.
+#You can use this software according to the terms and conditions of the Mulan PSL v2.
+#You may obtain a copy of Mulan PSL v2 at:
+#    http://license.coscl.org.cn/MulanPSL2
+#THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND, EITHER EXPRESS OR
+#IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT, MERCHANTABILITY OR FIT FOR A PARTICULAR
+#PURPOSE.
+#See the Mulan PSL v2 for more details.
+
+#binary repo
+
+[published-OS]
+name=published-OS
+baseurl=https://repo.openeuler.org/openEuler-20.03-LTS/OS/$basearch/
+enabled=0
+gpgcheck=0
+gpgkey=https://repo.openeuler.org/openEuler-20.03-LTS/OS/$basearch/RPM-GPG-KEY-openEuler
+ 
+[published-everything]
+name=published-everything
+baseurl=https://repo.openeuler.org/openEuler-20.03-LTS/everything/$basearch/
+enabled=1
+gpgcheck=0
+priority=2
+gpgkey=https://repo.openeuler.org/openEuler-20.03-LTS/everything/$basearch/RPM-GPG-KEY-openEuler
+
+[published-update]
+name=published-update
+baseurl=https://repo.openeuler.org/openEuler-20.03-LTS/update/$basearch/
+enabled=1
+gpgcheck=0
+priority=1
+gpgkey=https://repo.openeuler.org/openEuler-20.03-LTS/update/$basearch/RPM-GPG-KEY-openEuler
+
+[published-debuginfo]
+name=published-debuginfo
+baseurl=https://repo.openeuler.org/openEuler-20.03-LTS/debuginfo/$basearch/
+enabled=0
+gpgcheck=0
+gpgkey=https://repo.openeuler.org/openEuler-20.03-LTS/debuginfo/$basearch/RPM-GPG-KEY-openEuler
+
+[devel-obs]
+name=devel-obs
+baseurl=http://119.3.219.20:82/openEuler:/20.03:/LTS/standard_$basearch/
+enabled=1
+gpgcheck=0
+priority=3
+
+#source repo
+
+[published-everything-src]
+name=published-everything-src
+baseurl=https://repo.openeuler.org/openEuler-20.03-LTS/source
+enabled=0
+gpgcheck=0
+gpgkey=https://repo.openeuler.org/openEuler-20.03-LTS/source/$basearch/RPM-GPG-KEY-openEuler
+
+[published-update-src]
+name=published-update-src
+baseurl=https://repo.openeuler.org/openEuler-20.03-LTS/update/source
+enabled=0
+gpgcheck=0
+gpgkey=https://repo.openeuler.org/openEuler-20.03-LTS/update/source/RPM-GPG-KEY-openEuler
+
+#EPOL binary repo
+
+[published-EPOL]
+name=published-EPOL
+baseurl=https://repo.openeuler.org/openEuler-20.03-LTS/EPOL/$basearch/
+enabled=0
+gpgcheck=0
+gpgkey=https://repo.openeuler.org/openEuler-20.03-LTS/OS/$basearch/RPM-GPG-KEY-openEuler
+
+[published-Epol-update-src]
+name=published-Epol-update-src
+baseurl=https://repo.openeuler.org/openEuler-20.03-LTS/Epol/update/source
+enabled=0
+gpgcheck=0
+gpgkey=https://repo.openeuler.org/openEuler-20.03-LTS/Epol/update/source/RPM-GPG-KEY-openEuler
+
+[devel-epol-obs]
+name=devel-epol-obs
+baseurl=http://119.3.219.20:82/openEuler:/20.03:/LTS:/Epol/standard_$basearch/
+enabled=0
+gpgcheck=0
diff --git a/release-assistant/javcra/libs/config/global_config.py b/release-assistant/javcra/libs/config/global_config.py
new file mode 100644
index 0000000000000000000000000000000000000000..89b2f73c661e01d499144f421b58a90d6edb2bcb
--- /dev/null
+++ b/release-assistant/javcra/libs/config/global_config.py
@@ -0,0 +1,54 @@
+#!/usr/bin/python3
+# ******************************************************************************
+# Copyright (c) Huawei Technologies Co., Ltd. 2020-2020. All rights reserved.
+# licensed under the Mulan PSL v2.
+# You can use this software according to the terms and conditions of the Mulan PSL v2.
+# You may obtain a copy of Mulan PSL v2 at:
+#     http://license.coscl.org.cn/MulanPSL2
+# THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND, EITHER EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT, MERCHANTABILITY OR FIT FOR A PARTICULAR
+# PURPOSE.
+# See the Mulan PSL v2 for more details.
+# ******************************************************************************/
+"""
+Global environment variable value when the system is running
+"""
+
+import os
+
+# STATUS_CODE
+SUCCEED = 0
+FAILED = 1
+
+# global const for check_requires part
+# the config file of check_requires part will be stroed in the following
+CHECK_REQUIRES_CONFIG_FOLDER_PATH = os.path.join(os.path.dirname(__file__))
+
+# oscrc config
+# the template file of oscrc, which will be stored in CHECK_REQUIRES_CONFIG_FOLDER_PATH
+OSCRC_TEMPLETE = os.path.join(
+    CHECK_REQUIRES_CONFIG_FOLDER_PATH, 
+    "checkpart",
+    "check_requires",
+    "oscrc.templete"
+)
+DEFAULT_OSCRC_APIURL = "https://build.openeuler.org"
+DEFAULT_OSCRC_POSITION = "/root/.config/osc/oscrc"
+OSCRC_USER_FLAG = "@USERNAME@"
+OSCRC_PASS_FLAG = "@PASSWORD@"
+OSCRC_APIURL_FLAG = "@APIURL@"
+
+# yum.repo config
+YUM_REPO_TEMPLETE_FOLDER = os.path.join(
+    CHECK_REQUIRES_CONFIG_FOLDER_PATH,
+    "checkpart",
+    "check_requires",
+    "yum.repo"
+)
+OPENEULER_BRANCH_MAP = os.path.join(
+    CHECK_REQUIRES_CONFIG_FOLDER_PATH,
+    "checkpart",
+    "check_requires",
+    "support_branch.yaml"
+)
+SUPPORTED_BRANCHES_LIST = ["openEuler"]
\ No newline at end of file
diff --git a/release-assistant/requirement.txt b/release-assistant/requirement.txt
new file mode 100644
index 0000000000000000000000000000000000000000..350daf1a73bcaa1f145f7aa826874e4a1792d28b
--- /dev/null
+++ b/release-assistant/requirement.txt
@@ -0,0 +1,3 @@
+pyyaml
+requests
+unittest
\ No newline at end of file