diff --git a/NEWS.md b/NEWS.md
index 09579cf3..d9996552 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -16,6 +16,7 @@ Version 0.6.0
  - implement: register file associations
  - implement: when startup , open file provided by command line options
  - implement: open files pasted by clipboard
+ - fix: code fold parsing not correct
 
 Version 0.5.0
  - enhancement: support C++ using type alias;
diff --git a/RedPandaIDE/qsynedit/SynEdit.cpp b/RedPandaIDE/qsynedit/SynEdit.cpp
index a6e539d5..c24ddfda 100644
--- a/RedPandaIDE/qsynedit/SynEdit.cpp
+++ b/RedPandaIDE/qsynedit/SynEdit.cpp
@@ -2792,7 +2792,7 @@ void SynEdit::updateModifiedStatus()
 int SynEdit::scanFrom(int Index, int canStopIndex)
 {
     SynRangeState iRange;
-    int Result = Index;
+    int Result = std::max(0,Index);
     if (Result >= mLines->count())
         return Result;
 
@@ -5735,7 +5735,7 @@ void SynEdit::onLinesDeleted(int index, int count)
     if (mUseCodeFolding)
         foldOnListDeleted(index + 1, count);
     if (mHighlighter && mLines->count() > 0)
-        scanFrom(index, index);
+        scanFrom(index-1, index+1);
     invalidateLines(index + 1, INT_MAX);
     invalidateGutterLines(index + 1, INT_MAX);
 }
@@ -5747,7 +5747,7 @@ void SynEdit::onLinesInserted(int index, int count)
     if (mHighlighter && mLines->count() > 0) {
 //        int vLastScan = index;
 //        do {
-          scanFrom(index, index+count);
+          scanFrom(index-1, index+2+count);
 //            vLastScan++;
 //        } while (vLastScan < index + count) ;
     }