diff --git a/src/Matrix.cpp b/src/Matrix.cpp
index f73901e..a90338e 100644
--- a/src/Matrix.cpp
+++ b/src/Matrix.cpp
@@ -838,7 +838,7 @@ namespace Aurora {
         return Matrix::New(newBuffer,aMatrix);
     }
 
-    Matrix Matrix::mul(const Matrix& aOther){
+    Matrix Matrix::mul(const Matrix& aOther) const {
         if (isNull() || aOther.isNull()){
             std::cerr<<"Mul operation fail, Matrix is null!"<<std::endl;
             return Matrix();
diff --git a/src/Matrix.h b/src/Matrix.h
index 449bb0f..7e19a89 100644
--- a/src/Matrix.h
+++ b/src/Matrix.h
@@ -179,7 +179,7 @@ namespace Aurora {
          * @param aOther 
          * @return Matrix 
          */
-        Matrix mul(const Matrix& aOther);
+        Matrix mul(const Matrix& aOther) const;
         
         /**
          * 矩阵乘法
@@ -187,7 +187,7 @@ namespace Aurora {
          * @param aOther 
          * @return Matrix 
          */
-        Matrix mul(Matrix&& aOther);
+        Matrix mul(Matrix&& aOther) const;
 
         /**
          * print matrix , only support 2d matrix now