diff --git "a/\350\222\213\345\256\207\350\266\205/20220311_\345\261\225\347\244\272\351\235\231\346\200\201\350\265\204\346\272\220/promisedemo.js" "b/\350\222\213\345\256\207\350\266\205/20220311_\345\261\225\347\244\272\351\235\231\346\200\201\350\265\204\346\272\220/promisedemo.js"
new file mode 100644
index 0000000000000000000000000000000000000000..fde5f78ea3e62bb95c5062599693c667f82482cd
--- /dev/null
+++ "b/\350\222\213\345\256\207\350\266\205/20220311_\345\261\225\347\244\272\351\235\231\346\200\201\350\265\204\346\272\220/promisedemo.js"
@@ -0,0 +1,56 @@
+let fs = require('fs');
+let fileName = './1.txt';
+fs.exists(fileName, function (result) {
+
+    if (result) {
+        fs.readFile(fileName, function (err, data) {
+            console.log(data.toString());
+        })
+    }
+});
+
+let promise = new Promise(function (resolve, reject) {
+    setTimeout(function () {
+        resolve('我是成功状态');
+    }, 200);
+
+});
+
+function promiseFun() {
+
+    let promise = new Promise(function (resolve, reject) {
+        setTimeout(function () {
+            resolve('我是成功状态');
+
+        }, 200);
+
+    });
+    return promise;
+}
+
+async function demo() {
+    let result = await promiseFun();
+    console.log(result);
+    console.log('1');
+    console.log('2');
+    console.log('3');
+}
+
+
+function readFileByPromise(filename){
+    return new Promise(function(resolve,reject){
+        fs.readFile(fileName,function(err,data){
+            if(err){
+                reject(err.message);
+            }else{
+                resolve(data.toString());
+            }
+        })
+    })
+}
+async function handleFile(fileName){
+    let content = await readFileByPromise(fileName);
+    console.log(content);
+}
+
+handleFile('./1.txt');
\ No newline at end of file