diff --git a/designer-base/src/main/java/com/fr/design/gui/itree/filetree/FileNodeConstants.java b/designer-base/src/main/java/com/fr/design/gui/itree/filetree/FileNodeConstants.java
index f5da5302c4..60d727fda0 100644
--- a/designer-base/src/main/java/com/fr/design/gui/itree/filetree/FileNodeConstants.java
+++ b/designer-base/src/main/java/com/fr/design/gui/itree/filetree/FileNodeConstants.java
@@ -11,9 +11,8 @@ import com.fr.plugin.observer.PluginEventListener;
 import com.fr.report.ExtraReportClassManager;
 import com.fr.report.fun.ReportSupportedFileProvider;
 
-import java.util.ArrayList;
 import java.util.Arrays;
-import java.util.List;
+import java.util.LinkedHashSet;
 import java.util.Set;
 import java.util.concurrent.locks.ReadWriteLock;
 import java.util.concurrent.locks.ReentrantReadWriteLock;
@@ -23,7 +22,7 @@ import java.util.concurrent.locks.ReentrantReadWriteLock;
  */
 public class FileNodeConstants {
 
-    private static List<String> supportFileType;
+    private static Set<String> supportFileType;
     private static ReadWriteLock rwl = new ReentrantReadWriteLock();
 
     private FileNodeConstants() {
@@ -47,16 +46,14 @@ public class FileNodeConstants {
 
     private static void addAppExtensions(FileExtension[] extensions) {
         for (int i = 0, size = extensions.length; i < size; i++) {
-            if (!supportFileType.contains(extensions[i].getExtension())) {
-                supportFileType.add(extensions[i].getExtension());
-            }
+            supportFileType.add(extensions[i].getExtension());
         }
     }
 
     private static void initSupportedTypes() {
         try {
             rwl.writeLock().lock();
-            supportFileType = new ArrayList<String>();
+            supportFileType = new LinkedHashSet<>();
             //通过插件扩展的
             Set<ReportSupportedFileProvider> providers = ExtraReportClassManager.getInstance().getArray(ReportSupportedFileProvider.XML_TAG);
             for (ReportSupportedFileProvider provider : providers) {