diff --git a/graph/ascendc_ir/core/ascendc_ir.cc b/graph/ascendc_ir/core/ascendc_ir.cc
index f78eceea7546309cc6d041eac5fa0846316e027c..d08dfbc01ca34ebf70b2f60d750f9e103f9a710e 100644
--- a/graph/ascendc_ir/core/ascendc_ir.cc
+++ b/graph/ascendc_ir/core/ascendc_ir.cc
@@ -377,8 +377,16 @@ std::pair<AxisPtr, AxisPtr> AscGraphImpl::DoSplit(const int64_t axis_id, const s
   if (actual_outer_axis_name.empty()) {
     actual_outer_axis_name = single_axis.name + outer_suffix;
   }
-  const auto inner_size = CreateSizeVar(actual_inner_axis_name + "_size");
-  const auto outer_size = ge::sym::Ceiling(single_axis.size / inner_size);
+  ge::Expression inner_size;
+  ge::Expression outer_size;
+  if (single_axis.size == sym::kSymbolOne) {
+    inner_size = sym::kSymbolOne;
+    outer_size = sym::kSymbolOne;
+  } else {
+    inner_size = CreateSizeVar(actual_inner_axis_name + "_size");
+    outer_size = ge::sym::Ceiling(single_axis.size / inner_size);
+  }
+
   Axis::Type inner_type = is_tile_split ? Axis::kAxisTypeTileInner : Axis::kAxisTypeBlockInner;
   Axis::Type outer_type = is_tile_split ? Axis::kAxisTypeTileOuter : Axis::kAxisTypeBlockOuter;
   int64_t outter_id = static_cast<int64_t>(graph_attr_group_ptr->axis.size());
diff --git a/tests/ut/ascendc_ir/testcase/ascendc_ir_unittest.cc b/tests/ut/ascendc_ir/testcase/ascendc_ir_unittest.cc
index ea33a607188694d7abe2114edc21fc7b240a67bf..76cc9866e8a0900c78b3d58e796316fbc86d6207 100644
--- a/tests/ut/ascendc_ir/testcase/ascendc_ir_unittest.cc
+++ b/tests/ut/ascendc_ir/testcase/ascendc_ir_unittest.cc
@@ -139,6 +139,20 @@ TEST_F(UtestAscendCIR, TileSplit) {
   EXPECT_EQ(outer_axis.type, Axis::kAxisTypeTileOuter);
 }
 
+TEST_F(UtestAscendCIR, TileSplitSizeOneAxis) {
+  AscGraph graph("test_graph");
+  Axis &s0_axis = graph.CreateAxis("S0", ge::sym::kSymbolOne);
+  auto split_axis = graph.TileSplit(s0_axis.id);
+  EXPECT_NE(split_axis.first, nullptr);
+  EXPECT_NE(split_axis.second, nullptr);
+  auto &outer_axis = *split_axis.first;
+  auto &inner_axis = *split_axis.second;
+  EXPECT_EQ(inner_axis.type, Axis::kAxisTypeTileInner);
+  EXPECT_EQ(inner_axis.size, ge::sym::kSymbolOne);
+  EXPECT_EQ(outer_axis.type, Axis::kAxisTypeTileOuter);
+  EXPECT_EQ(outer_axis.size, ge::sym::kSymbolOne);
+}
+
 TEST_F(UtestAscendCIR, MergeAxis) {
   AscGraph graph("test_graph");
   const Expression s0 = graph.CreateSizeVar("s0");