diff --git a/src/main/java/com/gxwebsoft/common/system/controller/SettingController.java b/src/main/java/com/gxwebsoft/common/system/controller/SettingController.java
index fe42930..b6a951a 100644
--- a/src/main/java/com/gxwebsoft/common/system/controller/SettingController.java
+++ b/src/main/java/com/gxwebsoft/common/system/controller/SettingController.java
@@ -111,6 +111,10 @@ public class SettingController extends BaseController {
           // 更新系统设置信息到缓存 key = ""
           String key = setting.getSettingKey().concat(":").concat(loginUser.getTenantId().toString());
           redisUtil.set(key, JSON.parseObject(setting.getContent()));
+          // 上传配置变更后需同步清除上传缓存，避免 /api/oss/upload 继续命中旧配置
+          if ("upload".equals(setting.getSettingKey())) {
+            redisUtil.delete("Upload:" + loginUser.getTenantId());
+          }
           // 更新租户信息
           if (setting.getSettingKey().equals("setting")) {
             final String content = setting.getContent();
diff --git a/src/main/java/com/gxwebsoft/common/system/service/impl/SettingServiceImpl.java b/src/main/java/com/gxwebsoft/common/system/service/impl/SettingServiceImpl.java
index ac8455c..ce2bf0d 100644
--- a/src/main/java/com/gxwebsoft/common/system/service/impl/SettingServiceImpl.java
+++ b/src/main/java/com/gxwebsoft/common/system/service/impl/SettingServiceImpl.java
@@ -182,7 +182,15 @@ public class SettingServiceImpl extends ServiceImpl<SettingMapper, Setting> impl
 
     @Override
     public boolean updateByKey(Setting setting) {
-      return update(setting, new QueryWrapper<Setting>().eq("setting_key", setting.getSettingKey()));
+      boolean ok = update(setting, new QueryWrapper<Setting>().eq("setting_key", setting.getSettingKey()));
+      // 上传配置变更后必须清缓存，否则 /api/oss/upload 仍读到旧的 Upload:{tenantId} 缓存
+      if (ok && "upload".equals(setting.getSettingKey())) {
+        Integer tenantId = setting.getTenantId();
+        if (tenantId != null) {
+          redisUtil.delete("Upload:" + tenantId);
+        }
+      }
+      return ok;
     }
 
 }