diff --git a/cocos/ui/UIHelper.cpp b/cocos/ui/UIHelper.cpp
index 01ef4362ac..73f1fdbabc 100644
--- a/cocos/ui/UIHelper.cpp
+++ b/cocos/ui/UIHelper.cpp
@@ -109,7 +109,7 @@ Widget* Helper::seekActionWidgetByActionTag(Widget* root, int tag)
 	return nullptr;
 }
     
-std::string Helper::utf8_substr(const std::string& str, std::string::size_type start, std::string::size_type length)
+std::string Helper::getSubStringOfUTF8String(const std::string& str, std::string::size_type start, std::string::size_type length)
 {
     if (length==0)
     {
diff --git a/cocos/ui/UIHelper.h b/cocos/ui/UIHelper.h
index 7d174735e0..fb6136e7c7 100644
--- a/cocos/ui/UIHelper.h
+++ b/cocos/ui/UIHelper.h
@@ -68,13 +68,13 @@ public:
     static Widget* seekActionWidgetByActionTag(Widget* root, int tag);
     
     /**
-     * @brief Get a utf8 substring from a std::string with a given start position and length
-     *  Sample:  std::string str = "中国中国中国”;  substr = utf8_substr(str,0,2) will = "中国"
+     * @brief Get a UTF8 substring from a std::string with a given start position and length
+     *  Sample:  std::string str = "中国中国中国”;  substr = getSubStringOfUTF8String(str,0,2) will = "中国"
      * @param start The start position of the substring.
-     * @param length The length of the substring in utf8 count
-     * @return a utf8 substring
+     * @param length The length of the substring in UTF8 count
+     * @return a UTF8 substring
      */
-    static std::string utf8_substr(const std::string& str,
+    static std::string getSubStringOfUTF8String(const std::string& str,
                                    std::string::size_type start,
                                    std::string::size_type length);
 
diff --git a/cocos/ui/UIRichText.cpp b/cocos/ui/UIRichText.cpp
index b443cffba2..e6d53993d2 100644
--- a/cocos/ui/UIRichText.cpp
+++ b/cocos/ui/UIRichText.cpp
@@ -283,18 +283,18 @@ void RichText::handleTextRenderer(const std::string& text, const std::string& fo
         std::string curText = text;
         size_t stringLength = StringUtils::getCharacterCountInUTF8String(text);
         int leftLength = stringLength * (1.0f - overstepPercent);
-        std::string leftWords = Helper::utf8_substr(curText,0,leftLength);
-        std::string cutWords = Helper::utf8_substr(curText, leftLength, stringLength - leftLength);
+        std::string leftWords = Helper::getSubStringOfUTF8String(curText,0,leftLength);
+        std::string cutWords = Helper::getSubStringOfUTF8String(curText, leftLength, stringLength - leftLength);
         if (leftLength > 0)
         {
             Label* leftRenderer = nullptr;
             if (fileExist)
             {
-                leftRenderer = Label::createWithTTF(Helper::utf8_substr(leftWords, 0, leftLength), fontName, fontSize);
+                leftRenderer = Label::createWithTTF(Helper::getSubStringOfUTF8String(leftWords, 0, leftLength), fontName, fontSize);
             }
             else
             {
-                leftRenderer = Label::createWithSystemFont(Helper::utf8_substr(leftWords, 0, leftLength), fontName, fontSize);
+                leftRenderer = Label::createWithSystemFont(Helper::getSubStringOfUTF8String(leftWords, 0, leftLength), fontName, fontSize);
             }
             if (leftRenderer)
             {
diff --git a/cocos/ui/UITextField.cpp b/cocos/ui/UITextField.cpp
index 88cca2d6f5..eda603d421 100644
--- a/cocos/ui/UITextField.cpp
+++ b/cocos/ui/UITextField.cpp
@@ -133,7 +133,7 @@ void UICCTextField::insertText(const char*  text, size_t len)
             {
                 long length = _maxLength - text_count;
                 
-                input_text = Helper::utf8_substr(input_text, 0, length);
+                input_text = Helper::getSubStringOfUTF8String(input_text, 0, length);
                 len  = input_text.length();
             }
         }
@@ -415,7 +415,7 @@ void TextField::setText(const std::string& text)
         long total = text_count + StringUtils::getCharacterCountInUTF8String(getStringValue());
         if (total > max)
         {
-            strText = Helper::utf8_substr(strText, 0, max);
+            strText = Helper::getSubStringOfUTF8String(strText, 0, max);
         }
     }
     
diff --git a/tests/cpp-tests/Classes/UITest/CocoStudioGUITest/UIRichTextTest/UIRichTextTest.cpp b/tests/cpp-tests/Classes/UITest/CocoStudioGUITest/UIRichTextTest/UIRichTextTest.cpp
index 23174dc551..ae7d403f4e 100644
--- a/tests/cpp-tests/Classes/UITest/CocoStudioGUITest/UIRichTextTest/UIRichTextTest.cpp
+++ b/tests/cpp-tests/Classes/UITest/CocoStudioGUITest/UIRichTextTest/UIRichTextTest.cpp
@@ -26,12 +26,12 @@ bool UIRichTextTest::init()
               str1.c_str(),
               str1.length(),
               StringUtils::getCharacterCountInUTF8String(str1),
-              Helper::utf8_substr(str1, 0, 5).c_str());
+              Helper::getSubStringOfUTF8String(str1, 0, 5).c_str());
         CCLOG("str2:%s ascii length = %ld, utf8 length = %ld, substr = %s",
               str2.c_str(),
               str2.length(),
               StringUtils::getCharacterCountInUTF8String(str2),
-              Helper::utf8_substr(str2, 0, 2).c_str());
+              Helper::getSubStringOfUTF8String(str2, 0, 2).c_str());
         
         // Add the alert
         Text *alert = Text::create("RichText", "fonts/Marker Felt.ttf", 30);
diff --git a/tests/cpp-tests/Classes/UITest/CocoStudioGUITest/UITextFieldTest/UITextFieldTest.cpp b/tests/cpp-tests/Classes/UITest/CocoStudioGUITest/UITextFieldTest/UITextFieldTest.cpp
index 66048484b8..9f3b8485e6 100644
--- a/tests/cpp-tests/Classes/UITest/CocoStudioGUITest/UITextFieldTest/UITextFieldTest.cpp
+++ b/tests/cpp-tests/Classes/UITest/CocoStudioGUITest/UITextFieldTest/UITextFieldTest.cpp
@@ -277,7 +277,7 @@ bool UITextFieldTest_LineWrap::init()
         textField->ignoreContentAdaptWithSize(false);
         ((Label*)(textField->getVirtualRenderer()))->setLineBreakWithoutSpace(true);
         textField->setContentSize(Size(240, 170));
-        textField->setText("input words hereinput words hereinput words hereinput words hereinput words hereinput words here");
+        textField->setText("input words here");
         textField->setTextHorizontalAlignment(TextHAlignment::CENTER);
         textField->setTextVerticalAlignment(TextVAlignment::CENTER);
         textField->setPosition(Vec2(widgetSize.width / 2.0f, widgetSize.height / 2.0f));