diff --git a/designer_base/src/com/fr/design/extra/PluginHelper.java b/designer_base/src/com/fr/design/extra/PluginHelper.java
index 5d0c9fa1a..b258d495d 100644
--- a/designer_base/src/com/fr/design/extra/PluginHelper.java
+++ b/designer_base/src/com/fr/design/extra/PluginHelper.java
@@ -140,6 +140,14 @@ public class PluginHelper {
         List<PluginDependenceUnit> list = dependence.getDependPlugins();
         for (int i = 0;list != null && i < list.size(); i++){
             PluginDependenceUnit dependenceUnit = list.get(i);
+            //覆盖型依赖，立即下载安装
+            if (dependenceUnit.isCover()){
+                try {
+                    installCoverDependence(dependenceUnit);
+                } catch (Exception e) {
+                    throw new PluginDependenceException();
+                }
+            }
             if (!dependenceUnit.checkFileEnv()){
                 needInstallDependence.add(dependenceUnit);
             }
@@ -153,6 +161,31 @@ public class PluginHelper {
         installDependenceOnline(currentID, needInstallDependence);
     }
 
+    public static void installCoverDependence(PluginDependenceUnit dependenceUnit) throws Exception {
+        HttpClient httpClient = new HttpClient(SiteCenter.getInstance().acquireUrlByKind(dependenceUnit.getDependenceID()));
+        if (httpClient.getResponseCode() == HttpURLConnection.HTTP_OK) {
+            InputStream reader = httpClient.getResponseStream();
+            String temp = StableUtils.pathJoin(PluginHelper.DEPENDENCE_DOWNLOAD_PATH, PluginHelper.TEMP_FILE);
+            StableUtils.makesureFileExist(new File(temp));
+            FileOutputStream writer = new FileOutputStream(temp);
+            byte[] buffer = new byte[PluginConstants.BYTES_NUM];
+            int bytesRead = 0;
+            while ((bytesRead = reader.read(buffer)) > 0) {
+                writer.write(buffer, 0, bytesRead);
+                buffer = new byte[PluginConstants.BYTES_NUM];
+            }
+            reader.close();
+            writer.flush();
+            writer.close();
+
+
+            //安装文件
+            IOUtils.unZipFilesGBK(temp, FRContext.getCurrentEnv().getPath() + dependenceUnit.getDependenceDir());
+        }else {
+            throw new PluginDependenceException();
+        }
+    }
+
 
     /**
      * 构造一个下载UI