diff --git a/NEWS.md b/NEWS.md
index fd871abf..912d9178 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -8,6 +8,7 @@ Red Panda C++ Version 2.9
   - enhancement: Auto backup editing contents. (Save editing contents 3 seconds after input stopped. Auto delete when editor successfully closed)
   - enhancement: Add "Auto backup editing contents" option in options/editor/auto save
   - fix: rename project file will wrongly set it's encoding to 'ASCII';
+  - fix: Project's file encoding is wrongly set to 'AUTO' when load project.
 
 Red Panda C++ Version 2.8
 
diff --git a/RedPandaIDE/project.cpp b/RedPandaIDE/project.cpp
index ddd8a9ec..3cb33524 100644
--- a/RedPandaIDE/project.cpp
+++ b/RedPandaIDE/project.cpp
@@ -238,7 +238,7 @@ void Project::open()
         newUnit->setBuildCmd(fromByteArray(ini.GetValue(groupName,"BuildCmd", "")));
         QByteArray defaultEncoding = toByteArray(mOptions.encoding);
         //Compatibility
-        if (ini.GetBoolValue(groupName,"DetectEncoding",true)){
+        if (ini.GetBoolValue(groupName,"DetectEncoding",false)){
             defaultEncoding = ENCODING_AUTO_DETECT;
         }
 
@@ -767,7 +767,6 @@ bool Project::saveUnits()
             ini.SetValue(groupName,"FileEncoding", toByteArray(unit->encoding()));
         else
             ini.Delete(groupName,"FileEncoding");
-
     }
     ini.SetLongValue("Project","UnitCount",count);
     ini.SaveFile(mFilename.toLocal8Bit());
diff --git a/RedPandaIDE/settings.cpp b/RedPandaIDE/settings.cpp
index c5ec06ee..1b5e22e1 100644
--- a/RedPandaIDE/settings.cpp
+++ b/RedPandaIDE/settings.cpp
@@ -1519,7 +1519,7 @@ void Settings::Editor::doLoad()
     mSyntaxCheckWhenLineChanged = boolValue("check_syntax_when_line_changed",true);
 
     //auto save
-    mEnableEditTempBackup = boolValue("enable_edit_temp_backup",true);
+    mEnableEditTempBackup = boolValue("enable_edit_temp_backup", false);
     mEnableAutoSave = boolValue("enable_auto_save",false);
     mAutoSaveInterval = intValue("auto_save_interal",10);
     mAutoSaveTarget = static_cast<enum AutoSaveTarget>(