diff --git a/frameworks/bridge/declarative_frontend/jsview/js_text.cpp b/frameworks/bridge/declarative_frontend/jsview/js_text.cpp
index aa69fe323cb3c7fd3e88512ac25749668b917479..978e2d1634d4f0c6dc59c727e193cd34134dd257 100644
--- a/frameworks/bridge/declarative_frontend/jsview/js_text.cpp
+++ b/frameworks/bridge/declarative_frontend/jsview/js_text.cpp
@@ -193,20 +193,21 @@ void JSText::SetFontSize(const JSCallbackInfo& info)
     }
     CalcDimension fontSize;
     RefPtr<ResourceObject> resObj;
-    if (ParseJsDimensionNG(info[0], fontSize, DimensionUnit::FP, resObj, false)) {
-        if (SystemProperties::ConfigChangePerform() && resObj) {
-            RegisterResource<CalcDimension>("FontSize", resObj, fontSize);
-            return;
-        }
-    } else {
+    UnRegisterResource("FontSize");
+    JSRef<JSVal> args = info[0];
+    if (!ParseJsDimensionFpNG(args, fontSize, resObj, false) || fontSize.IsNegative()) {
         auto pipelineContext = PipelineContext::GetCurrentContextSafelyWithCheck();
         CHECK_NULL_VOID(pipelineContext);
         auto theme = pipelineContext->GetTheme<TextTheme>();
         CHECK_NULL_VOID(theme);
         fontSize = theme->GetTextStyle().GetFontSize();
+        TextModel::GetInstance()->SetFontSize(fontSize);
+        return;
     }
-    UnRegisterResource("FontSize");
     TextModel::GetInstance()->SetFontSize(fontSize);
+    if (SystemProperties::ConfigChangePerform() && resObj) {
+        RegisterResource<CalcDimension>("FontSize", resObj, fontSize);
+    }
 }
 
 void JSText::SetFontWeight(const JSCallbackInfo& info)