diff --git a/ios/sdk/WeexSDK/Sources/Model/WXComponent.mm b/ios/sdk/WeexSDK/Sources/Model/WXComponent.mm
index acdeb30d7d..5681183081 100644
--- a/ios/sdk/WeexSDK/Sources/Model/WXComponent.mm
+++ b/ios/sdk/WeexSDK/Sources/Model/WXComponent.mm
@@ -643,7 +643,7 @@ - (void)_updateStylesOnComponentThread:(NSDictionary *)styles resetStyles:(NSMut
     
     BOOL isTransitionTag = _transition ? [self _isTransitionTag:styles] : NO;
     if (isTransitionTag) {
-        [_transition _handleTransitionWithStyles:styles resetStyles:resetStyles target:self];
+        [_transition _handleTransitionWithStyles:[styles mutableCopy] resetStyles:resetStyles target:self];
     } else {
         styles = [self parseStyles:styles];
         [self _updateCSSNodeStyles:styles];