diff --git a/src/main/java/com/zhangmeng/tools/controller/FileEditController.java b/src/main/java/com/zhangmeng/tools/controller/FileEditController.java
index 7ae3886..3d69dc6 100644
--- a/src/main/java/com/zhangmeng/tools/controller/FileEditController.java
+++ b/src/main/java/com/zhangmeng/tools/controller/FileEditController.java
@@ -32,6 +32,7 @@ import javafx.stage.FileChooser;
 import javafx.stage.Stage;
 import javafx.util.Callback;
 import lombok.extern.slf4j.Slf4j;
+import org.apache.commons.io.FileUtils;
 import org.apache.commons.io.FilenameUtils;
 import org.fxmisc.flowless.VirtualizedScrollPane;
 import org.fxmisc.richtext.CodeArea;
@@ -75,6 +76,7 @@ public class FileEditController {
         GO,
         JS,
         CSS,
+        SQL
     }
 
     @FXML
@@ -109,7 +111,7 @@ public class FileEditController {
         Stage stage = new Stage();
         FileChooser dc = new FileChooser();
         dc.setTitle("文件选择");
-        dc.getExtensionFilters().addAll(new FileChooser.ExtensionFilter("文件类型", "*.java", "*.go", "*.txt", "*.json"));
+        dc.getExtensionFilters().addAll(new FileChooser.ExtensionFilter("文件类型", "*.java", "*.go", "*.txt", "*.json","*.sql"));
         File file = dc.showOpenDialog(stage);
         if (file != null) {
             refresh(file, true);
@@ -266,10 +268,11 @@ public class FileEditController {
                     ex.printStackTrace();
                 }
             }
-
-            codeArea.textProperty().addListener((obs, oldText, newText) -> {
-                codeArea.setStyleSpans(0, computeHighlighting(newText, type));
-            });
+            if (!(FileUtils.sizeOf(file) > 50 * 1024 * 1024 )){
+                codeArea.textProperty().addListener((obs, oldText, newText) -> {
+                    codeArea.setStyleSpans(0, computeHighlighting(newText, type));
+                });
+            }
             codeArea.replaceText(0, 0, file_content);
             Tab tab = new Tab(file.getName());