diff --git a/cocos/2d/CCLabel.cpp b/cocos/2d/CCLabel.cpp
index db32fa085f..f8eb51e1df 100644
--- a/cocos/2d/CCLabel.cpp
+++ b/cocos/2d/CCLabel.cpp
@@ -476,7 +476,6 @@ void Label::setString(const std::string& text)
     std::u16string utf16String;
     if (StringUtils::UTF8ToUTF16(_originalUTF8String, utf16String))
     {
-        _originalUTF16String = utf16String;
         _currentUTF16String  = utf16String;
     }
 }
@@ -927,10 +926,16 @@ void Label::setFontDefinition(const FontDefinition& textDefinition)
 
 void Label::updateContent()
 {
+    std::u16string utf16String;
+    if (StringUtils::UTF8ToUTF16(_originalUTF8String, utf16String))
+    {
+        _currentUTF16String  = utf16String;
+    }
+
     computeStringNumLines();
     if (_fontAtlas)
     {
-        computeHorizontalKernings(_originalUTF16String);
+        computeHorizontalKernings(_currentUTF16String);
     }
 
     if (_textSprite)
diff --git a/cocos/2d/CCLabel.h b/cocos/2d/CCLabel.h
index eaffb636e1..f8c7a1ab77 100644
--- a/cocos/2d/CCLabel.h
+++ b/cocos/2d/CCLabel.h
@@ -344,7 +344,6 @@ protected:
 
     int           _currNumLines;
     std::u16string _currentUTF16String;
-    std::u16string _originalUTF16String;
     std::string          _originalUTF8String;
 
     float _fontScale;
diff --git a/cocos/2d/CCLabelTextFormatter.cpp b/cocos/2d/CCLabelTextFormatter.cpp
index 6a0a7aed63..9dfd813039 100644
--- a/cocos/2d/CCLabelTextFormatter.cpp
+++ b/cocos/2d/CCLabelTextFormatter.cpp
@@ -173,9 +173,9 @@ bool LabelTextFormatter::multilineText(Label *theLabel)
 
     std::u16string strNew(multiline_string.begin(), multiline_string.end());
     
-    theLabel->_originalUTF16String = strNew;
+    theLabel->_currentUTF16String = strNew;
     theLabel->computeStringNumLines();
-    theLabel->computeHorizontalKernings(theLabel->_originalUTF16String);
+    theLabel->computeHorizontalKernings(theLabel->_currentUTF16String);
 
     return true;
 }