diff --git a/clang/lib/StaticAnalyzer/Checkers/OpenHarmony/OHPtrImplicitConversionChecker.cpp b/clang/lib/StaticAnalyzer/Checkers/OpenHarmony/OHPtrImplicitConversionChecker.cpp
index 71e69b0ced968db1a853ea0d7133f3ba0fc15b0c..e7cdbd8a0af246c7700090e0932e82448ff0f6d4 100644
--- a/clang/lib/StaticAnalyzer/Checkers/OpenHarmony/OHPtrImplicitConversionChecker.cpp
+++ b/clang/lib/StaticAnalyzer/Checkers/OpenHarmony/OHPtrImplicitConversionChecker.cpp
@@ -12,6 +12,7 @@
 //
 //===----------------------------------------------------------------------===//
 
+#include "clang/AST/Type.h"
 #include "clang/StaticAnalyzer/Checkers/BuiltinCheckerRegistration.h"
 #include "clang/StaticAnalyzer/Core/BugReporter/BugType.h"
 #include "clang/StaticAnalyzer/Core/Checker.h"
@@ -65,6 +66,16 @@ void OHPtrImplicitConversionChecker::checkPreStmt(const ImplicitCastExpr *Cast,
   if (Cast->getCastKind() != CK_ConstructorConversion) {
     return;
   }
+  FunctionDecl *FD = dyn_cast<FunctionDecl>(ND);
+  if (FD) {
+    ArrayRef<ParmVarDecl *> PAR = FD->parameters();
+    QualType PT = PAR[0]->getOriginalType();
+    std::string PTS = PT.getAsString();
+    if (PTS.find("wptr") != std::string::npos ||
+        PTS.find("sptr") != std::string::npos) {
+      return;
+    }
+  }
 
   std::string cf = ND->getNameAsString();
   if (cf == "sptr" || cf == "wptr") {
diff --git a/clang/test/Analysis/implicit_conversion.cpp b/clang/test/Analysis/implicit_conversion.cpp
index 9b211c758eee8b1d2219550581ce0eea60593553..701f8b69615dcf477968c5b33469fa130f7c38ee 100644
--- a/clang/test/Analysis/implicit_conversion.cpp
+++ b/clang/test/Analysis/implicit_conversion.cpp
@@ -1,13 +1,13 @@
 // RUN: %clang --analyze -Xanalyzer -analyzer-checker=openharmony.OHPtrImplicitConversion %s
 
-#include "refbase.h"
+#include "./refbase.h"
 
-using namespace std;
 using namespace OHOS;
 
 class Derived:public RefBase{};
+class Other{};
 void sptr_test_good_case01(){
-    sptr<RefBase> s(new RefBase);
+    sptr<RefBase> s(new RefBase());
 }
 
 void sptr_test_good_case02(){
@@ -19,18 +19,15 @@ void sptr_test_good_case03(){
     sptr<RefBase> s(new Derived());
 }
 
-sptr<RefBase> sptr_test_good_case0405_helper(sptr<RefBase> s){
-    return s;
-}
-
 void sptr_test_good_case04(){
-    sptr<RefBase> s(new RefBase());
-    sptr<RefBase> sp = sptr_test_good_case0405_helper(s);
+    sptr<Derived> s(new Derived());
+    sptr<RefBase> p = s;
 }
 
 sptr<RefBase> sptr_test_good_case05(){
     sptr<RefBase> s(new RefBase());
-    sptr<RefBase> p = sptr_test_good_case0405_helper(s);
+    sptr<RefBase> p = s;
+    return p;
 }
 
 void sptr_test_bad_case01(){
@@ -55,13 +52,17 @@ void sptr_test_bad_case04(){
     sptr<RefBase> s = nullptr;  // expected-warning {{Implicit convert pointer to sptr/wptr}}
 }
 
-
 /********************wptr******************/
 void wptr_test_good_case01(){
     wptr<RefBase> w(new RefBase());
     wptr<RefBase> wp = w;
 }
 
+void wptr_test_good_case02(){
+    wptr<Derived> w(new Derived());
+    wptr<RefBase> s = w;
+}
+
 void wptr_test_bad_case01(){
     RefBase * r = new Derived();
     wptr<RefBase> w = r;    // expected-warning {{Implicit convert pointer to sptr/wptr}}
diff --git a/clang/test/Analysis/refbase.h b/clang/test/Analysis/refbase.h
index 505dfa6d15475d604ea4760c899351a84a227c8a..4997dd54b46b5ee513f22aa62d9f571cbc77f7fb 100644
--- a/clang/test/Analysis/refbase.h
+++ b/clang/test/Analysis/refbase.h
@@ -34,8 +34,10 @@ namespace OHOS
         sptr(T *other) : refs_(other){};
         sptr(const sptr<T> &other) : refs_(other.GetRefPtr()) {}
         sptr(sptr<T> &&other) : refs_(other.GetRefPtr()) {}
+        template <typename O>
+        sptr(const sptr<O> &other) : refs_(other.GetRefPtr()){}
         ~sptr() { 
-            delete refs_; // expected-warning {{Attempt to delete released memory}}
+            delete refs_; 
         }
         sptr<T> &operator=(sptr<T> &&other)
         {