diff --git a/app/views/organizations/new.html.erb b/app/views/organizations/new.html.erb
index ea7fbbb30..e12bf3849 100644
--- a/app/views/organizations/new.html.erb
+++ b/app/views/organizations/new.html.erb
@@ -30,14 +30,15 @@
         </li>
         <li class=" mb5 ml80">
           <label >公开&nbsp;&nbsp;：</label>
-          <input id="organization_is_public" name="organization[is_public]"  type="checkbox" value="1" checked="checked">
+          <input id="organization_is_public" name="organization[is_public]" onblur="disable_down($(this), $('#organization_alow_download'), $('#allow_down_hint'));" type="checkbox" value="1" checked="checked">
           <span class="c_grey">（打钩为公开，不打钩则不公开，若不公开，仅组织成员可见该组织。）</span>
           <div class="cl"></div>
         </li>
         <li class=" mb5" style="margin-left:40px;   ">
           <label >允许游客下载：</label>
-          <input id="organization_alow_download" name="organization[allow_guest_download]"  type="checkbox" value="1" checked="checked">
+          <input id="organization_alow_download"  name="organization[allow_guest_download]"  type="checkbox" value="1" checked="checked">
           <span class="c_grey">（打钩为允许游客下载文件）</span>
+          <span class="c_green f12" id="allow_down_hint"></span>
           <div class="cl"></div>
         </li>
         <li class=" ml125" >
diff --git a/app/views/organizations/setting.html.erb b/app/views/organizations/setting.html.erb
index 9ec118bec..b9b2f9b4c 100644
--- a/app/views/organizations/setting.html.erb
+++ b/app/views/organizations/setting.html.erb
@@ -63,11 +63,12 @@
         </div>
         <div class="cl"></div>
         <div class="orgRow mb10 mt5"><span style="margin-left:38px;" >公开&nbsp;: </span>
-          <input type="checkbox" name="organization[is_public]" <%= @organization.is_public ? 'checked': ''%> class="ml3" />
+          <input type="checkbox" id="is_public" onblur="disable_down($(this), $('#allow_download'),$('#allow_down_hint'));" name="organization[is_public]" <%= @organization.is_public ? 'checked': ''%> class="ml3" />
         </div>
         <div class="orgRow mb10 mt5"><span style="margin-left:10px;">下载支持&nbsp;: </span>
-          <input type="checkbox" style="margin-top:5px;" name="organization[allow_guest_download]" <%= @organization.allow_guest_download ? 'checked': ''%> class="ml3" />
+          <input id="allow_download" type="checkbox" style="margin-top:5px;" <%= @organization.is_public? ? "":"DISABLED" %> name="organization[allow_guest_download]" <%= @organization.allow_guest_download ? 'checked': ''%> class="ml3" />
           &nbsp;<span>允许游客下载</span>
+          <span class="c_green f12" id="allow_down_hint"><%= @organization.is_public? ? "" : "（私有组织不允许游客下载资源）" %></span>
         </div>
         <a href="javascript:void(0);" class="saveBtn ml80 db fl" onclick="update_org(<%=@organization.id %>);">保存</a>
         <% end %>
@@ -187,4 +188,13 @@
           $("#apply_hint").text("子域名命名不规范，只能包含字母、数字和下划线，请重新输入");
     }
   }
+
+//  $(document).ready(function(){
+//    if ( $("#is_public").attr("checked") != true){
+//        alert($(this).attr("checked"));
+//        $("#allow_download").attr("checked", false);
+//        $("#allow_download").attr("disabled", true);
+//        $("#allow_down_hint").html("");
+//  }
+//  });
 </script>
\ No newline at end of file
diff --git a/public/javascripts/application.js b/public/javascripts/application.js
index f982d92f6..8fba6770a 100644
--- a/public/javascripts/application.js
+++ b/public/javascripts/application.js
@@ -1135,3 +1135,16 @@ function chooseSendType(res_id,res_ids, user_id, send_type){
   }
   lastSendType = sendType;
 }
+
+function disable_down(source, des, hint){
+  if (source.attr("checked")){
+    des.attr("disabled", false);
+    hint.html("");
+  }
+  else{
+    des.attr("checked", false);
+    des.attr("disabled", true);
+    hint.html("（私有组织不允许游客下载资源）");
+
+  }
+}