diff --git a/src/mindspore2022/mindspore/python/mindspore/_extends/graph_kernel/expanders/fused_mul_add.py b/src/mindspore2022/mindspore/python/mindspore/_extends/graph_kernel/expanders/fused_mul_add.py
index 86f3a4d1..3cad5a0a 100644
--- a/src/mindspore2022/mindspore/python/mindspore/_extends/graph_kernel/expanders/fused_mul_add.py
+++ b/src/mindspore2022/mindspore/python/mindspore/_extends/graph_kernel/expanders/fused_mul_add.py
@@ -20,9 +20,23 @@ class FusedMulAdd(Expander):
     """FusedMulAdd expander"""
 
     def _expand(self, graph_builder):
+        """
+        执行扩展操作。
+
+        Args:
+            graph_builder (GraphBuilder): 图构建器对象。
+
+        Returns:
+            Tensor: 执行加法操作后的结果。
+
+        """
+        # 获取输入
         input_x, input_y, input_z = self.inputs
 
+        # 发射乘法操作
         mul_res = graph_builder.emit('Mul', [input_x, input_y])
+        # 发射加法操作
         result = graph_builder.emit('Add', [mul_res, input_z])
 
+        # 返回结果
         return result