diff --git a/NEWS.md b/NEWS.md
index 27018902..2e3cc7bd 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -14,6 +14,7 @@ Red Panda C++ Version 2.25
   - fix: Press '>' after '-' don't show completion suggestion info.
   - fix: Icon position not correct under hiPDI devices.
   - change: Add Mesa3D for windows opengl driver to the integrated mingw-gcc for windows 32 version.
+  - enhancement: After compiler settings changed, run/debug current file will auto recompile.
   
 Red Panda C++ Version 2.24
 
diff --git a/RedPandaIDE/mainwindow.cpp b/RedPandaIDE/mainwindow.cpp
index 67b95e5d..97c3a101 100644
--- a/RedPandaIDE/mainwindow.cpp
+++ b/RedPandaIDE/mainwindow.cpp
@@ -2126,7 +2126,9 @@ void MainWindow::runExecutable(
             return;
         }
     } else {
-        if (!filename.isEmpty() && compareFileModifiedTime(filename,exeName)>=0) {
+        if (!filename.isEmpty() &&
+                ( compareFileModifiedTime(filename,exeName)>=0
+                  || compareFileModifiedTime(exeName, pSettings->compilerSets().defaultIndexTimestamp())<=0 )) {
             doCompileRun(runType);
             return;
         }
@@ -2435,7 +2437,9 @@ void MainWindow::debug()
                     mCompileSuccessionTask->binDirs = binDirs;
                     compile();
                     return;
-                } else if (compareFileModifiedTime(e->filename(),filePath)>=0) {
+                } else if (
+                           compareFileModifiedTime(e->filename(),filePath)>=0
+                           || compareFileModifiedTime(filePath, pSettings->compilerSets().defaultIndexTimestamp())<=0 ) {
                     mCompileSuccessionTask=std::make_shared<CompileSuccessionTask>();
                     mCompileSuccessionTask->type = CompileSuccessionTaskType::Debug;
                     mCompileSuccessionTask->binDirs = binDirs;
diff --git a/RedPandaIDE/settings.cpp b/RedPandaIDE/settings.cpp
index bc42d6bc..d4fc3e0d 100644
--- a/RedPandaIDE/settings.cpp
+++ b/RedPandaIDE/settings.cpp
@@ -3158,11 +3158,13 @@ void Settings::CompilerSets::saveSets()
         saveSet(i);
     }
     if (mDefaultIndex>=(int)mList.size()) {
-        mDefaultIndex = mList.size()-1;
+        setDefaultIndex( mList.size()-1 );
     }
     mSettings->mSettings.beginGroup(SETTING_COMPILTER_SETS);
     mSettings->mSettings.setValue(SETTING_COMPILTER_SETS_DEFAULT_INDEX,mDefaultIndex);
+    mSettings->mSettings.setValue(SETTING_COMPILTER_SETS_DEFAULT_INDEX_TIMESTAMP,mDefaultIndexTimeStamp);
     mSettings->mSettings.setValue(SETTING_COMPILTER_SETS_COUNT,(int)mList.size());
+
     mSettings->mSettings.endGroup();
 }
 
@@ -3170,7 +3172,8 @@ void Settings::CompilerSets::loadSets()
 {
     mList.clear();
     mSettings->mSettings.beginGroup(SETTING_COMPILTER_SETS);
-    mDefaultIndex =mSettings->mSettings.value(SETTING_COMPILTER_SETS_DEFAULT_INDEX,-1).toInt();
+    mDefaultIndex = mSettings->mSettings.value(SETTING_COMPILTER_SETS_DEFAULT_INDEX,-1).toInt();
+    mDefaultIndexTimeStamp = mSettings->mSettings.value(SETTING_COMPILTER_SETS_DEFAULT_INDEX_TIMESTAMP,0).toLongLong();
     int listSize = mSettings->mSettings.value(SETTING_COMPILTER_SETS_COUNT,0).toInt();
     mSettings->mSettings.endGroup();
     bool loadError = false;
@@ -3184,7 +3187,7 @@ void Settings::CompilerSets::loadSets()
     }
     if (loadError) {
         mList.clear();
-        mDefaultIndex = -1;
+        setDefaultIndex(-1);
     }
     PCompilerSet pCurrentSet = defaultSet();
     if (pCurrentSet) {
@@ -3241,7 +3244,7 @@ void Settings::CompilerSets::loadSets()
         pCurrentSet = defaultSet();
         if (!pCurrentSet) {
             mList.clear();
-            mDefaultIndex = -1;
+            setDefaultIndex(-1);
             saveSets();
             return;
         }
@@ -3254,6 +3257,7 @@ void Settings::CompilerSets::saveDefaultIndex()
 {
     mSettings->mSettings.beginGroup(SETTING_COMPILTER_SETS);
     mSettings->mSettings.setValue(SETTING_COMPILTER_SETS_DEFAULT_INDEX,mDefaultIndex);
+    mSettings->mSettings.setValue(SETTING_COMPILTER_SETS_DEFAULT_INDEX_TIMESTAMP,mDefaultIndexTimeStamp);
     mSettings->mSettings.endGroup();
 }
 
@@ -3266,9 +3270,6 @@ void Settings::CompilerSets::deleteSet(int index)
         mSettings->mSettings.endGroup();
     }
     mList.erase(std::begin(mList)+index);
-    if (mDefaultIndex>=(int)mList.size()) {
-        mDefaultIndex = mList.size()-1;
-    }
     saveSets();
 }
 
@@ -3282,9 +3283,15 @@ int Settings::CompilerSets::defaultIndex() const
     return mDefaultIndex;
 }
 
+qint64 Settings::CompilerSets::defaultIndexTimestamp() const
+{
+    return mDefaultIndexTimeStamp;
+}
+
 void Settings::CompilerSets::setDefaultIndex(int value)
 {
     mDefaultIndex = value;
+    mDefaultIndexTimeStamp = QDateTime::currentMSecsSinceEpoch();
 }
 
 Settings::PCompilerSet Settings::CompilerSets::defaultSet()
diff --git a/RedPandaIDE/settings.h b/RedPandaIDE/settings.h
index 0fbbb8ab..3f2d8ea5 100644
--- a/RedPandaIDE/settings.h
+++ b/RedPandaIDE/settings.h
@@ -45,6 +45,7 @@
 #define SETTING_CODE_FORMATTER "CodeFormatter"
 #define SETTING_COMPILTER_SETS "CompilerSets"
 #define SETTING_COMPILTER_SETS_DEFAULT_INDEX "defaultIndex"
+#define SETTING_COMPILTER_SETS_DEFAULT_INDEX_TIMESTAMP "defaultIndexTimestamp"
 #define SETTING_COMPILTER_SETS_COUNT "count"
 #define SETTING_COMPILTER_SET "CompilerSet_%1"
 #define SETTING_EDITOR_DEFAULT_ENCODING "default_encoding"
@@ -1547,6 +1548,7 @@ public:
         size_t size() const;
         int defaultIndex() const;
         void setDefaultIndex(int value);
+        qint64 defaultIndexTimestamp() const;
         PCompilerSet defaultSet();
         PCompilerSet getSet(int index);
 
@@ -1567,6 +1569,7 @@ public:
     private:
         CompilerSetList mList;
         int mDefaultIndex;
+        qint64 mDefaultIndexTimeStamp;
         Settings* mSettings;
         QStringList mCompilerCompatibleIndex; // index for old settings compatibility
     };
diff --git a/RedPandaIDE/settingsdialog/compilersetoptionwidget.cpp b/RedPandaIDE/settingsdialog/compilersetoptionwidget.cpp
index e79b619f..2314974f 100644
--- a/RedPandaIDE/settingsdialog/compilersetoptionwidget.cpp
+++ b/RedPandaIDE/settingsdialog/compilersetoptionwidget.cpp
@@ -202,6 +202,8 @@ void CompilerSetOptionWidget::doSave()
     if (pSettings->compilerSets().size()>0) {
         saveCurrentCompilerSet();
     }
+    //update default index timestamp
+    pSettings->compilerSets().setDefaultIndex(pSettings->compilerSets().defaultIndex());
     pSettings->compilerSets().saveSets();
     pMainWindow->updateCompilerSet();
 }
diff --git a/libs/redpanda_qt_utils/qt_utils/utils.cpp b/libs/redpanda_qt_utils/qt_utils/utils.cpp
index cbc04cae..c022c1a1 100644
--- a/libs/redpanda_qt_utils/qt_utils/utils.cpp
+++ b/libs/redpanda_qt_utils/qt_utils/utils.cpp
@@ -743,3 +743,14 @@ void clearQPlainTextEditFormat(QTextEdit *editor)
     cursor.setCharFormat(QTextCharFormat());
     cursor.clearSelection();
 }
+
+int compareFileModifiedTime(const QString &filename, qint64 timestamp)
+{
+    QFileInfo fileInfo1(filename);
+    qint64 time=fileInfo1.lastModified().toMSecsSinceEpoch();
+    if (time > timestamp)
+        return 1;
+    if (time < timestamp)
+        return -1;
+    return 0;
+}
diff --git a/libs/redpanda_qt_utils/qt_utils/utils.h b/libs/redpanda_qt_utils/qt_utils/utils.h
index ee194853..cf387433 100644
--- a/libs/redpanda_qt_utils/qt_utils/utils.h
+++ b/libs/redpanda_qt_utils/qt_utils/utils.h
@@ -147,6 +147,7 @@ QString escapeSpacesInString(const QString& str);
 bool isReadOnly(const QString& filename);
 
 int compareFileModifiedTime(const QString& filename1, const QString& filename2);
+int compareFileModifiedTime(const QString& filename1, qint64 timestamp);
 
 /* UI utils */
 void inflateRect(QRect& rect, int delta);