diff --git a/interfaces/kits/napi/src/napi_accessibility_utils.cpp b/interfaces/kits/napi/src/napi_accessibility_utils.cpp
index 0c474c329..b3e071c0d 100644
--- a/interfaces/kits/napi/src/napi_accessibility_utils.cpp
+++ b/interfaces/kits/napi/src/napi_accessibility_utils.cpp
@@ -462,6 +462,17 @@ bool CheckObserverEqual(napi_env env, napi_value observer, napi_env iterEnv, nap
     return false;
 }
 
+static int32_t SafeSubtract(int32_t minuend, int32_t subtrahend)
+{
+    if (subtrahend > 0 && minuend < INT32_MIN + subtrahend) {
+        return 0;
+    }
+    if (subtrahend < 0 && minuend > INT32_MAX + subtrahend) {
+        return 0;
+    }
+    return minuend - subtrahend;
+}
+
 /**********************************************************
  * Convert native object to js object
  *********************************************************/
@@ -476,12 +487,12 @@ void ConvertRectToJS(napi_env env, napi_value result, const Accessibility::Rect&
     NAPI_CALL_RETURN_VOID(env, napi_set_named_property(env, result, "top", nLeftTopY));
 
     napi_value nWidth = nullptr;
-    int32_t width = rect.GetRightBottomXScreenPostion() - rect.GetLeftTopXScreenPostion();
+    int32_t width = SafeSubtract(rect.GetRightBottomXScreenPostion(), rect.GetLeftTopXScreenPostion());
     NAPI_CALL_RETURN_VOID(env, napi_create_int32(env, width, &nWidth));
     NAPI_CALL_RETURN_VOID(env, napi_set_named_property(env, result, "width", nWidth));
 
     napi_value nHeight = nullptr;
-    int32_t height = rect.GetRightBottomYScreenPostion() - rect.GetLeftTopYScreenPostion();
+    int32_t height = SafeSubtract(rect.GetRightBottomYScreenPostion(), rect.GetLeftTopYScreenPostion());
     NAPI_CALL_RETURN_VOID(env, napi_create_int32(env, height, &nHeight));
     NAPI_CALL_RETURN_VOID(env, napi_set_named_property(env, result, "height", nHeight));
 }