diff --git a/src/main/java/com/example/jmacro/wjdr/JMainController.java b/src/main/java/com/example/jmacro/wjdr/JMainController.java
index 505b837..0b08844 100644
--- a/src/main/java/com/example/jmacro/wjdr/JMainController.java
+++ b/src/main/java/com/example/jmacro/wjdr/JMainController.java
@@ -1,16 +1,20 @@
 package com.example.jmacro.wjdr;
 
+import cn.hutool.core.thread.ThreadUtil;
 import com.example.jmacro.wjdr.base.Legend;
 import com.example.jmacro.wjdr.base.ViewRect;
 import com.example.jmacro.wjdr.tool.PickLegend;
 import com.example.jmacro.wjdr.tool.PickPoint;
 import com.example.jmacro.wjdr.tool.PickRect;
 import com.example.jmacro.wjdr.util.DialogUtil;
+import com.example.jmacro.wjdr.util.TaskUtil;
 import javafx.fxml.FXML;
 import javafx.scene.control.Button;
+import javafx.scene.image.Image;
 import javafx.scene.image.ImageView;
 
 import java.awt.*;
+import java.util.concurrent.Semaphore;
 
 /**
  * UI控制器
@@ -30,6 +34,8 @@ public class JMainController {
     @FXML
     private ImageView preview;
 
+    private Semaphore semaphore = new Semaphore(1);
+
     /**
      * 采点
      */
@@ -99,9 +105,25 @@ public class JMainController {
         boolean stop = JMainService.stop();
         this.start.setDisable(!stop);
         this.stop.setDisable(stop);
+        this.preview.setImage(null);
     }
 
-    public ImageView getPreview() {
-        return preview;
+    /**
+     * 预览
+     * @param image
+     */
+    public void preview(Image image) {
+        try {
+            if (!JMainService.getInstance().run){
+                return;
+            }
+            semaphore.acquire();
+            preview.setImage(image);
+            Thread.sleep(500);
+            semaphore.release();
+        } catch (InterruptedException e) {
+            semaphore.release();
+            throw new RuntimeException(e);
+        }
     }
 }
diff --git a/src/main/java/com/example/jmacro/wjdr/util/ImageUtil.java b/src/main/java/com/example/jmacro/wjdr/util/ImageUtil.java
index 7e941e5..4b0a169 100644
--- a/src/main/java/com/example/jmacro/wjdr/util/ImageUtil.java
+++ b/src/main/java/com/example/jmacro/wjdr/util/ImageUtil.java
@@ -115,7 +115,7 @@ public class ImageUtil {
      *
      * @param rect 区域
      */
-    public synchronized static void show(ViewRect rect) {
+    public static void show(ViewRect rect) {
         Robot robot = JMainService.getInstance().getMacro().getRobot();
         BufferedImage screenCapture = robot.createScreenCapture(new Rectangle(rect.getLeft(), rect.getTop(), rect.getWidth(), rect.getHeight()));
         show(screenCapture);
@@ -126,7 +126,7 @@ public class ImageUtil {
      *
      * @param image 图片
      */
-    public synchronized static void show(BufferedImage image) {
+    public static void show(BufferedImage image) {
         int viewSize = 100;
         Image showImage = image;
         // 图片太大时进行缩放显示
@@ -140,6 +140,6 @@ public class ImageUtil {
         ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
         ImgUtil.write(showImage, "PNG", outputStream);
         javafx.scene.image.Image image1 = new javafx.scene.image.Image(new ByteArrayInputStream(outputStream.toByteArray()));
-        JMainApplication.mainController.getPreview().setImage(image1);
+        JMainApplication.mainController.preview(image1);
     }
 }