diff --git a/README.md b/README.md
index 59b47a3..3f76540 100644
--- a/README.md
+++ b/README.md
@@ -569,7 +569,7 @@ TinySTL
 
 ####(19):cow_ptr
 
-    cow_ptr<string> cp1(new string("zouxiaohang"));
+    cow_ptr<string> cp1 = make_cow<string>("zouxiaohang");
 	auto cp2 = cp1, cp3 = cp1;
 	assert(cp1 == cp2 && cp2 == cp3);
 	assert(*cp1 == *cp2 && *cp2 == *cp3 && *cp3 == "zouxiaohang");
diff --git a/TinySTL/COWPtr.h b/TinySTL/COWPtr.h
index d758e1b..67886e7 100644
--- a/TinySTL/COWPtr.h
+++ b/TinySTL/COWPtr.h
@@ -68,6 +68,11 @@ namespace TinySTL{
 		template<class _T>
 		friend class Detail::proxy;
 	};
+
+	template<class T, class... Args>
+	cow_ptr<T> make_cow(Args...args){
+		return cow_ptr<T>(new T(std::forward<Args>(args)...));
+	}
 }
 
 #include "Detail\COWPtr.impl.h"
diff --git a/TinySTL/Test/COWPtrTest.cpp b/TinySTL/Test/COWPtrTest.cpp
index 41bc178..7fddae0 100644
--- a/TinySTL/Test/COWPtrTest.cpp
+++ b/TinySTL/Test/COWPtrTest.cpp
@@ -28,7 +28,7 @@ namespace TinySTL{
 			assert(cp4 == nullptr);
 		}
 		void testCase2(){
-			cow_ptr<string> cp1(new string("zouxiaohang"));
+			cow_ptr<string> cp1 = make_cow<string>("zouxiaohang");
 			auto cp2 = cp1, cp3 = cp1;
 			assert(cp1 == cp2 && cp2 == cp3);
 			assert(*cp1 == *cp2 && *cp2 == *cp3 && *cp3 == "zouxiaohang");