diff --git a/func/Module_artifact_label.py b/func/Module_artifact_label.py
index 7754abe..f79f52b 100644
--- a/func/Module_artifact_label.py
+++ b/func/Module_artifact_label.py
@@ -300,8 +300,10 @@ class MainWindow_artifact_label(QMainWindow):
             del self.rectangles_ax0_patches
             del self.rectangles_ax1_patches
             del self.annotation_tableWidget
-            self.ax0.clear()
-            self.ax1.clear()
+            if self.ax0 is not None:
+                self.ax0.clear()
+            if self.ax1 is not None:
+                self.ax1.clear()
 
             # 释放资源
             del self.data
diff --git a/func/Module_detect_Jpeak.py b/func/Module_detect_Jpeak.py
index 3744bf6..6f6c5b0 100644
--- a/func/Module_detect_Jpeak.py
+++ b/func/Module_detect_Jpeak.py
@@ -204,7 +204,8 @@ class MainWindow_detect_Jpeak(QMainWindow):
             QApplication.processEvents()
 
             # 清空画框
-            self.ax0.clear()
+            if self.ax0 is not None:
+                self.ax0.clear()
 
             # 释放资源
             del self.data
diff --git a/func/Module_detect_Rpeak.py b/func/Module_detect_Rpeak.py
index a64d20c..9b73f7d 100644
--- a/func/Module_detect_Rpeak.py
+++ b/func/Module_detect_Rpeak.py
@@ -197,8 +197,10 @@ class MainWindow_detect_Rpeak(QMainWindow):
             QApplication.processEvents()
 
             # 清空画框
-            self.ax0.clear()
-            self.ax1.clear()
+            if self.ax0 is not None:
+                self.ax0.clear()
+            if self.ax1 is not None:
+                self.ax1.clear()
 
             # 释放资源
             del self.data
diff --git a/func/Module_label_check.py b/func/Module_label_check.py
index b97a1fd..ec22501 100644
--- a/func/Module_label_check.py
+++ b/func/Module_label_check.py
@@ -340,8 +340,10 @@ class MainWindow_label_check(QMainWindow):
             del self.point_peak_original
             del self.point_peak_corrected
             del self.annotation_tableWidget
-            self.ax0.clear()
-            self.ax1.clear()
+            if self.ax0 is not None:
+                self.ax0.clear()
+            if self.ax1 is not None:
+                self.ax1.clear()
 
             # 释放资源
             del self.data
diff --git a/func/Module_preprocess.py b/func/Module_preprocess.py
index 823aadd..dbf6921 100644
--- a/func/Module_preprocess.py
+++ b/func/Module_preprocess.py
@@ -239,7 +239,8 @@ class MainWindow_preprocess(QMainWindow):
             QApplication.processEvents()
 
             # 清空画框
-            self.ax0.clear()
+            if self.ax0 is not None:
+                self.ax0.clear()
 
             # 释放资源
             del self.data