diff --git a/designer-base/src/main/java/com/fr/design/file/FileOperationHelper.java b/designer-base/src/main/java/com/fr/design/file/FileOperationHelper.java
index bdbab64136..bc947df414 100644
--- a/designer-base/src/main/java/com/fr/design/file/FileOperationHelper.java
+++ b/designer-base/src/main/java/com/fr/design/file/FileOperationHelper.java
@@ -18,6 +18,8 @@ import com.fr.workspace.WorkContext;
 import com.fr.workspace.resource.ResourceIOException;
 import org.jetbrains.annotations.NotNull;
 
+import java.nio.file.Path;
+import java.nio.file.Paths;
 import java.util.ArrayList;
 
 import static javax.swing.JOptionPane.WARNING_MESSAGE;
@@ -27,8 +29,6 @@ import static javax.swing.JOptionPane.WARNING_MESSAGE;
  */
 public class FileOperationHelper {
 
-    private static final char DIR_SEPARATOR = '/';
-
     private static final FileOperationHelper INSTANCE = new FileOperationHelper();
 
     public static FileOperationHelper getInstance() {
@@ -36,10 +36,10 @@ public class FileOperationHelper {
     }
 
     /**
-     * 检查多个目标文件夹是否含有源文件夹的子文件夹
+     * 检查目标文件夹是否为多个源文件夹中，任一文件夹的子文件夹
      *
-     * @param fileNodes
-     * @param targetNode
+     * @param fileNodes  需移动的源文件
+     * @param targetNode 移动后的目标文件夹
      * @return
      */
     public boolean isSubDirectory(@NotNull ExpandMutableTreeNode[] fileNodes, @NotNull FileNode targetNode) {
@@ -55,17 +55,16 @@ public class FileOperationHelper {
     /**
      * 检查目标文件夹是否为源文件夹的子文件夹
      *
-     * @param sourceFileNode
-     * @param targetNode
+     * @param sourceFileNode 需移动的源文件
+     * @param targetNode     移动后的目标文件夹
      */
     public boolean isSubDirectory(@NotNull FileNode sourceFileNode, @NotNull FileNode targetNode) {
         if (!sourceFileNode.isDirectory() || !targetNode.isDirectory()) {
             return false;
         }
-        String sourceDir = sourceFileNode.getEnvPath();
-        String targetDir = targetNode.getEnvPath();
-        return StringUtils.equals(targetDir, sourceDir) ||
-                (targetDir.startsWith(sourceDir) && targetDir.charAt(sourceDir.length()) == DIR_SEPARATOR);
+        Path sourceDir = Paths.get(sourceFileNode.getEnvPath());
+        Path targetDir = Paths.get(targetNode.getEnvPath());
+        return targetDir.startsWith(sourceDir);
     }
 
     public String moveFile(FileNode sourceFileNode, String targetDir) {