diff --git a/app/controllers/concerns/git_helper.rb b/app/controllers/concerns/git_helper.rb
index c19c6fdd6..9242b87ac 100644
--- a/app/controllers/concerns/git_helper.rb
+++ b/app/controllers/concerns/git_helper.rb
@@ -23,7 +23,7 @@ module GitHelper
         Rails.logger.info "encoding: #{cd['encoding']} confidence: #{cd['confidence']}"
         # 字符编码问题，GB18030编码识别率不行
         decode_content =
-            if cd["encoding"] == 'GB18030' && cd['confidence'] == 1.0
+            if cd["encoding"] == 'GB18030' && cd['confidence'] > 0.8
               content.encode('UTF-8', 'GBK', {:invalid => :replace, :undef => :replace, :replace => ' '})
             else
               content.force_encoding('UTF-8')