diff --git a/NEWS.md b/NEWS.md
index 68586972..c997ca1c 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -4,6 +4,7 @@ Red Panda C++ Version 2.12
   - fix: Crash when create or open txt files in project.
   - enhancement: Code folding for #if/#endif
   - enhancement: When folding "if", don't fold "else";
+  - fix: Confirm if recompile, when start to debug and project files has modifications.
 
 Red Panda C++ Version 2.11
 
diff --git a/RedPandaIDE/mainwindow.cpp b/RedPandaIDE/mainwindow.cpp
index 93949442..39cd6411 100644
--- a/RedPandaIDE/mainwindow.cpp
+++ b/RedPandaIDE/mainwindow.cpp
@@ -2131,6 +2131,7 @@ void MainWindow::debug()
             }
             return;
         }
+
         // Did we compile?
         if (!fileExists(mProject->executable())) {
             if (QMessageBox::question(
@@ -2162,6 +2163,25 @@ void MainWindow::debug()
             compile();
             return;
         }
+        {
+            QFileInfo execInfo(mProject->executable());
+            QDateTime execModTime = execInfo.lastModified();
+            if (execInfo.exists() && mProject->unitsModifiedSince(execModTime)  &&
+                    QMessageBox::question(
+                        this,
+                        tr("Rebuild Project"),
+                        tr("Project has been modified, do you want to rebuild it?")
+                                                          ) == QMessageBox::Yes) {
+                //mProject->saveAll();
+                mCompileSuccessionTask=std::make_shared<CompileSuccessionTask>();
+                mCompileSuccessionTask->type = CompileSuccessionTaskType::Debug;
+                mCompileSuccessionTask->execName=mProject->executable();
+                mCompileSuccessionTask->isExecutable=true;
+                mCompileSuccessionTask->binDirs=binDirs;
+                compile();
+                return;
+            }
+        }
         // Did we choose a host application for our DLL?
         if (mProject->options().type == ProjectType::DynamicLib) {
             if (mProject->options().hostApplication.isEmpty()) {