diff --git a/NEWS.md b/NEWS.md
index 74534ec1..d0554791 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -11,6 +11,8 @@ Red Panda C++ Version 2.10
   - fix: If buttons in the options dialog / compiler / compiler set page is pressed, they won't release.
   - enhancement: Confirm before remove a compiler set.
   - enhancement: If there is "cppreference.chm" or "cppreference-%locale_name%.chm"(like cppreference-zh_CN.chm) in the redpanda C++'s app folder, open it instead of the cppreference website.
+  - enhancement: Use lldb-mi as the debugger.
+  - enhancement: Set lldb-mi as the debugger program for clang, when finding compiler set in folders.
 
 Red Panda C++ Version 2.9
 
diff --git a/RedPandaIDE/debugger.cpp b/RedPandaIDE/debugger.cpp
index 8c8028e7..e98436e0 100644
--- a/RedPandaIDE/debugger.cpp
+++ b/RedPandaIDE/debugger.cpp
@@ -35,6 +35,7 @@
 
 Debugger::Debugger(QObject *parent) : QObject(parent),
     mForceUTF8(false),
+    mDebuggerType(DebuggerType::GDB),
     mLastLoadtime(0),
     mProjectLastLoadtime(0)
 {
@@ -84,6 +85,10 @@ bool Debugger::start(int compilerSetIndex, const QString& inferior, const QStrin
         return false;
     }
     setForceUTF8(CompilerInfoManager::forceUTF8InDebugger(compilerSet->compilerType()));
+    if (compilerSet->debugger().endsWith(LLDB_MI_PROGRAM))
+        setDebuggerType(DebuggerType::LLDB_MI);
+    else
+        setDebuggerType(DebuggerType::GDB);
     mExecuting = true;
     QString debuggerPath = compilerSet->debugger();
     //QFile debuggerProgram(debuggerPath);
@@ -507,7 +512,14 @@ void Debugger::refreshWatchVars()
 {
     if (mExecuting) {
         sendAllWatchVarsToDebugger();
-        sendCommand("-var-update"," --all-values *");
+        if (mDebuggerType==DebuggerType::LLDB_MI) {
+            for (PWatchVar var:mWatchModel->watchVars()) {
+                if (!var->name.isEmpty())
+                    sendCommand("-var-update",QString(" --all-values %1").arg(var->name));
+            }
+        } else {
+            sendCommand("-var-update"," --all-values *");
+        }
     }
 }
 
@@ -518,6 +530,16 @@ void Debugger::fetchVarChildren(const QString &varName)
     }
 }
 
+DebuggerType Debugger::debuggerType() const
+{
+    return mDebuggerType;
+}
+
+void Debugger::setDebuggerType(DebuggerType newDebuggerType)
+{
+    mDebuggerType = newDebuggerType;
+}
+
 bool Debugger::forceUTF8() const
 {
     return mForceUTF8;
@@ -606,10 +628,17 @@ void Debugger::sendBreakpointCommand(PBreakpoint breakpoint)
         }
         QString filename = breakpoint->filename;
         filename.replace('\\','/');
-        sendCommand("-break-insert",
-                    QString("%1 --source \"%2\" --line %3")
-                    .arg(condition,filename)
-                    .arg(breakpoint->line));
+        if (debuggerType()==DebuggerType::LLDB_MI) {
+            sendCommand("-break-insert",
+                        QString("%1 \"%2:%3\"")
+                        .arg(condition, filename)
+                        .arg(breakpoint->line));
+        } else {
+            //        sendCommand("-break-insert",
+            //                    QString("%1 --source \"%2\" --line %3")
+            //                    .arg(condition,filename)
+            //                    .arg(breakpoint->line));
+        }
     }
 }
 
@@ -1261,12 +1290,15 @@ void DebugReader::runNextCmd()
     }
 
     //clang compatibility
-    if (pCmd->command == "-break-insert" && mDebugger->forceUTF8()) {
+    if (mDebugger->forceUTF8()) {
         params = pCmd->params.toUtf8();
     }
     if (pCmd->command == "-var-create") {
         //hack for variable creation,to easy remember var expression
-        params = " - @ "+params;
+        if (mDebugger->debuggerType()==DebuggerType::LLDB_MI)
+            params = " - * "+params;
+        else
+            params = " - @ "+params;
     } else if (pCmd->command == "-var-list-children") {
         //hack for list variable children,to easy remember var expression
         params = " --all-values \"" + params+'\"';
@@ -1565,8 +1597,9 @@ QByteArray DebugReader::removeToken(const QByteArray &line)
 void DebugReader::asyncUpdate()
 {
     QMutexLocker locker(&mCmdQueueMutex);
-    if (mCmdQueue.isEmpty())
+    if (mCmdQueue.isEmpty()) {
         postCommand("-var-update"," --all-values *",DebugCommandSource::HeartBeat);
+    }
     mAsyncUpdated = false;
 }
 
diff --git a/RedPandaIDE/debugger.h b/RedPandaIDE/debugger.h
index 6463703d..8d591dca 100644
--- a/RedPandaIDE/debugger.h
+++ b/RedPandaIDE/debugger.h
@@ -39,6 +39,11 @@ enum class DebugCommandSource {
     Other
 };
 
+enum class DebuggerType {
+    GDB,
+    LLDB_MI
+};
+
 struct DebugCommand{
     QString command;
     QString params;
@@ -342,6 +347,7 @@ public:
     void sendAllWatchVarsToDebugger();
     PWatchVar findWatchVar(const QString& expression);
     PWatchVar watchVarAt(const QModelIndex& index);
+    void refreshVars();
 //    void notifyWatchVarUpdated(PWatchVar var);
 
     std::shared_ptr<BacktraceModel> backtraceModel();
@@ -360,6 +366,9 @@ public:
     bool forceUTF8() const;
     void setForceUTF8(bool newForceUTF8);
 
+    DebuggerType debuggerType() const;
+    void setDebuggerType(DebuggerType newDebuggerType);
+
 signals:
     void evalValueReady(const QString& s);
     void memoryExamineReady(const QStringList& s);
@@ -402,6 +411,7 @@ private:
     DebugReader *mReader;
     DebugTarget *mTarget;
     bool mForceUTF8;
+    DebuggerType mDebuggerType;
     int mLeftPageIndexBackup;
     qint64 mLastLoadtime;
     qint64 mProjectLastLoadtime;
diff --git a/RedPandaIDE/gdbmiresultparser.cpp b/RedPandaIDE/gdbmiresultparser.cpp
index 925eb243..0bea0e6f 100644
--- a/RedPandaIDE/gdbmiresultparser.cpp
+++ b/RedPandaIDE/gdbmiresultparser.cpp
@@ -374,12 +374,22 @@ int GDBMIResultParser::ParseValue::hexValue(int defaultValue) const
 QString GDBMIResultParser::ParseValue::pathValue() const
 {
     //Q_ASSERT(mType == ParseValueType::Value);
-    return QFileInfo(QString::fromLocal8Bit(mValue)).absoluteFilePath();
+    QByteArray value=mValue;
+#ifdef Q_OS_WIN
+    if (value.startsWith("/") && !value.startsWith("//"))
+        value=value.mid(1);
+#endif
+    return QFileInfo(QString::fromLocal8Bit(value)).absoluteFilePath();
 }
 
 QString GDBMIResultParser::ParseValue::utf8PathValue() const
 {
-    return QFileInfo(QString::fromUtf8(mValue)).absoluteFilePath();
+    QByteArray value=mValue;
+#ifdef Q_OS_WIN
+    if (value.startsWith("/") && !value.startsWith("//"))
+        value=value.mid(1);
+#endif
+    return QFileInfo(QString::fromUtf8(value)).absoluteFilePath();
 }
 
 GDBMIResultParser::ParseValueType GDBMIResultParser::ParseValue::type() const
diff --git a/RedPandaIDE/mainwindow.cpp b/RedPandaIDE/mainwindow.cpp
index f13dad96..e1ce840c 100644
--- a/RedPandaIDE/mainwindow.cpp
+++ b/RedPandaIDE/mainwindow.cpp
@@ -1001,11 +1001,13 @@ void MainWindow::removeActiveBreakpoints()
     }
 }
 
-void MainWindow::setActiveBreakpoint(QString FileName, int Line, bool setFocus)
+void MainWindow::setActiveBreakpoint(QString fileName, int Line, bool setFocus)
 {
     removeActiveBreakpoints();
+    if (!fileExists(fileName))
+        return;
     // Then active the current line in the current file
-    Editor *e = openFile(FileName);
+    Editor *e = openFile(fileName);
     if (e!=nullptr) {
         e->setActiveBreakpointFocus(Line,setFocus);
     }
diff --git a/RedPandaIDE/settings.cpp b/RedPandaIDE/settings.cpp
index 4fd996a7..d2126573 100644
--- a/RedPandaIDE/settings.cpp
+++ b/RedPandaIDE/settings.cpp
@@ -2305,8 +2305,13 @@ void Settings::CompilerSet::setExecutables()
     if (mCompilerType == CompilerType::Clang) {
         mCCompiler =  findProgramInBinDirs(CLANG_PROGRAM);
         mCppCompiler = findProgramInBinDirs(CLANG_CPP_PROGRAM);
-        mDebugger = findProgramInBinDirs(GDB_PROGRAM);
-        mDebugServer = findProgramInBinDirs(GDB_SERVER_PROGRAM);
+        mDebugger = findProgramInBinDirs(LLDB_MI_PROGRAM);
+        if (mDebugger.isEmpty()) {
+            mDebugger = findProgramInBinDirs(GDB_PROGRAM);
+            mDebugServer = findProgramInBinDirs(GDB_SERVER_PROGRAM);
+        } else {
+            mDebugServer = findProgramInBinDirs(LLDB_SERVER_PROGRAM);
+        }
         if (mCCompiler.isEmpty())
             mCCompiler =  findProgramInBinDirs(GCC_PROGRAM);
         if (mCppCompiler.isEmpty())
diff --git a/RedPandaIDE/systemconsts.h b/RedPandaIDE/systemconsts.h
index aec8dc5d..a57059ac 100644
--- a/RedPandaIDE/systemconsts.h
+++ b/RedPandaIDE/systemconsts.h
@@ -36,6 +36,7 @@
 #define CLANG_PROGRAM   "clang.exe"
 #define CLANG_CPP_PROGRAM   "clang++.exe"
 #define LLDB_MI_PROGRAM   "lldb-mi.exe"
+#define LLDB_SERVER_PROGRAM   "lldb-server.exe"
 #elif defined(Q_OS_LINUX)
 #define CONSOLE_PAUSER  "consolepauser"
 #define GCC_PROGRAM     "gcc"
@@ -52,6 +53,7 @@
 #define CLANG_PROGRAM   "clang"
 #define CLANG_CPP_PROGRAM   "clang++"
 #define LLDB_MI_PROGRAM   "lldb-mi"
+#define LLDB_SERVER_PROGRAM   "lldb-server"
 #elif defined(Q_OS_MACOS)
 #define GCC_PROGRAM     "gcc"
 #define GPP_PROGRAM     "g++"
@@ -67,8 +69,9 @@
 #define CLANG_PROGRAM   "clang"
 #define CLANG_CPP_PROGRAM   "clang++"
 #define LLDB_MI_PROGRAM   "lldb-mi"
+#define LLDB_SERVER_PROGRAM   "lldb-server"
 #else
-#error "Only support windows and linux now!"
+#error "Only support windows, Linux and MacOS now!"
 #endif
 
 #define DEV_PROJECT_EXT "dev"