diff --git a/app/controllers/application_controller.rb b/app/controllers/application_controller.rb
index 601ebb8a..0e783c74 100644
--- a/app/controllers/application_controller.rb
+++ b/app/controllers/application_controller.rb
@@ -61,6 +61,9 @@ class ApplicationController < ActionController::Base
   # rescue_from ActionController::InvalidAuthenticityToken, :with => :invalid_authenticity_token
   rescue_from ::Unauthorized, :with => :deny_access
   rescue_from ::ActionView::MissingTemplate, :with => :missing_template
+  rescue_from ::ActiveRecord::RecordNotFound do
+    render_404
+  end
 
   include Redmine::Search::Controller
   include Redmine::MenuManager::MenuController
diff --git a/app/controllers/libraries_controller.rb b/app/controllers/libraries_controller.rb
index f3559b05..68b36df0 100644
--- a/app/controllers/libraries_controller.rb
+++ b/app/controllers/libraries_controller.rb
@@ -21,7 +21,7 @@ class LibrariesController < ApplicationController
   end
 
   def show
-    @library = Library.find(params[:id])
+    @library = current_library
     return render_403 unless admin_or_self? || @library.published?
 
     @library_applies = @library.library_applies.where(status: :refused).order('created_at desc')
@@ -50,11 +50,13 @@ class LibrariesController < ApplicationController
   end
 
   def edit
+    return render_403 unless admin_or_self?
     @library = current_library
-    redirect_to library_path(id: @library.id) unless @library.editable?
   end
 
   def update
+    return render_403 unless admin_or_self?
+
     @library = current_library
     Libraries::SaveService.new(@library, current_user, form_params).call
     if with_publish?
@@ -71,6 +73,24 @@ class LibrariesController < ApplicationController
     render 'edit'
   end
 
+  def destroy
+    if admin_or_business?
+      current_library.destroy
+    elsif current_library.user_id == current_user.id
+      unless current_library.pending?
+        render json: { status: -1, message: '只有草稿才能删除' }
+        return
+      end
+
+      current_library.destroy
+    else
+      render_403
+      return
+    end
+
+    render json: { status: 0, message: 'success' }
+  end
+
   def publish
     Libraries::SubmitService.new(current_library).call
     render json: { status: 0 }
@@ -84,7 +104,7 @@ class LibrariesController < ApplicationController
   private
 
   def current_library
-    @_current_library ||= current_user.libraries.find(params[:id])
+    @_current_library ||= Library.find(params[:id])
   end
 
   def form_params
@@ -100,6 +120,6 @@ class LibrariesController < ApplicationController
   end
 
   def admin_or_self?
-    @library.user_id == current_user.id || current_user.admin?
+    current_library.user_id == current_user.id || admin_or_business?
   end
 end
\ No newline at end of file
diff --git a/app/models/library.rb b/app/models/library.rb
index 78bc7fc5..63df5c91 100644
--- a/app/models/library.rb
+++ b/app/models/library.rb
@@ -45,8 +45,4 @@ class Library < ActiveRecord::Base
   def increment_visited_count!
     Library.connection.execute("update libraries set visited_count = COALESCE(visited_count, 0) + 1 where id = #{id}")
   end
-
-  def editable?
-    pending? || refused?
-  end
 end
\ No newline at end of file
diff --git a/app/services/libraries/save_service.rb b/app/services/libraries/save_service.rb
index 3a81d379..db244836 100644
--- a/app/services/libraries/save_service.rb
+++ b/app/services/libraries/save_service.rb
@@ -17,7 +17,7 @@ class Libraries::SaveService
       library.generate_uuid
     end
 
-    attachment_ids = params.delete(:attachment_ids)
+    attachment_ids = params.delete(:attachment_ids).try(:compact)
 
     ActiveRecord::Base.transaction do
       library.assign_attributes(params)
@@ -32,6 +32,6 @@ class Libraries::SaveService
   private
 
   def validate_params!
-    raise Error, '附件不能为空' if params[:attachment_ids].blank?
+    raise Error, '附件不能为空' if params[:attachment_ids].try(:compact).blank?
   end
 end
diff --git a/app/services/libraries/submit_service.rb b/app/services/libraries/submit_service.rb
index 965ba673..6af3284b 100644
--- a/app/services/libraries/submit_service.rb
+++ b/app/services/libraries/submit_service.rb
@@ -8,6 +8,8 @@ class Libraries::SubmitService
   end
 
   def call
+    return if library.processing?
+
     raise Error, '该状态下不能提交审核' unless library.may_submit?
 
     ActiveRecord::Base.transaction do
diff --git a/app/views/attachments/_from_libraries.html.erb b/app/views/attachments/_from_libraries.html.erb
index 4abb3c80..a6fe347d 100644
--- a/app/views/attachments/_from_libraries.html.erb
+++ b/app/views/attachments/_from_libraries.html.erb
@@ -16,6 +16,7 @@
       <span class="color-grey mr10 fl"><%= number_to_human_size attachment.filesize %></span>
       <%= link_to('<i class="fa fa-trash-o mr5"></i>'.html_safe, attachment_path(attachment, :attachment_id => "p#{i}", :format => 'js'), :method => 'delete', :remote => true, :class => 'remove-upload') unless attachment.id.nil? %>
       <%= hidden_field_tag "attachments[p#{i}][token]", "#{attachment.token}" %>
+      <%= hidden_field_tag "attachments[p#{i}][attachment_id]", attachment.id %>
     </span>
       <% end %>
       <% container.saved_attachments.each_with_index do |attachment, i| %>
diff --git a/app/views/layouts/base_library.html.erb b/app/views/layouts/base_library.html.erb
index 766069bb..ebc56f4d 100644
--- a/app/views/layouts/base_library.html.erb
+++ b/app/views/layouts/base_library.html.erb
@@ -67,5 +67,11 @@
 </div>
 </body>
 <script>
+  $(function(){
+    var message = '<%= flash[:message] %>';
+    if (message.length > 0) {
+      sure_confirm_box("提示",450,200,message);
+    }
+  })
 </script>
 </html>
\ No newline at end of file
diff --git a/app/views/libraries/_form.html.erb b/app/views/libraries/_form.html.erb
index a1692e2b..86abea58 100644
--- a/app/views/libraries/_form.html.erb
+++ b/app/views/libraries/_form.html.erb
@@ -49,7 +49,7 @@
     </div>
 
     <div class="operate mt20 mb20 clearfix">
-      <%= link_to '确认提交', 'javascript:void(0)', class: 'white-btn edu-blueback-btn changebtn mr20 fl apply-publish-btn' %>
+      <%= link_to '申请发布', 'javascript:void(0)', class: 'white-btn edu-blueback-btn changebtn mr20 fl apply-publish-btn' %>
       <%= link_to '保存', 'javascript:void(0)', class: 'white-btn edu-blueline-btn changebtn mr20 fl submit-btn' %>
     </div>
   <% end %>
@@ -86,43 +86,38 @@
     imageUploadURL: "<%= upload_with_markdown_path(container_id: 0, container_type: 'MarkDown') %>" //url
   });
 
-  $(function(){
-    var submitForm = function(){
-      var title = $("input[name='library[title]']").val();
-      var content = $("textarea[name='library[content]']").val();
+  var submitForm = function(){
+    var title = $("input[name='library[title]']").val();
+    var content = $("textarea[name='library[content]']").val();
 
-      if (!title || title.length == 0) {
-        $("#title_notice").removeClass("none");
-        return
-      }else{
-          $("#title_notice").addClass("none");
-      }
-      if (!content || content.length == 0) {
-        $("#des_notice").removeClass("none");
-        return
-      }else{
-          $("#des_notice").addClass("none");
-      }
+    if (!title || title.length == 0) {
+      $("#title_notice").removeClass("none");
+      return
+    }else{
+      $("#title_notice").addClass("none");
+    }
+    if (!content || content.length == 0) {
+      $("#des_notice").removeClass("none");
+      return
+    }else{
+      $("#des_notice").addClass("none");
+    }
 
-      if($('.attachments_fields .attachment').length == 0){
-        $("#file_notice").removeClass("none");
-        return
-      }else{
-          $("#file_notice").addClass("none");
-      }
+    if($('.attachments_fields .attachment').length == 0){
+      $("#file_notice").removeClass("none");
+      return
+    }else{
+      $("#file_notice").addClass("none");
+    }
 
-      $('.library-form-container form').submit();
-    };
+    $('.library-form-container form').submit();
+  };
 
+  $(function(){
     $('.apply-publish-btn').on('click', function(){
-      $('input[name="apply_publish"]').val(true);
+      $("input[name='apply_publish']").val(true);
       submitForm();
     });
     $('.submit-btn').on('click', submitForm);
-
-    var message = '<%= flash[:message] %>';
-    if (message.length > 0) {
-        sure_confirm_box("提示",450,200,message);
-    }
-  })
+  });
 </script>
\ No newline at end of file
diff --git a/app/views/libraries/index.html.erb b/app/views/libraries/index.html.erb
index 7c8d099f..cc34dc81 100644
--- a/app/views/libraries/index.html.erb
+++ b/app/views/libraries/index.html.erb
@@ -16,7 +16,7 @@
       </ul>
       <div class="edu-position fr">
         <%= hidden_field_tag(:type, params[:type]) %>
-        <input class="winput-240-30 panel-box-sizing" placeholder="输入教学案例标题、编号进行检索" type="text" id="search_name">
+        <input class="winput-300-35 panel-box-sizing" placeholder="输入教学案例标题、编号进行检索" type="text" id="search_name">
         <a href="javascript:void(0);" class="edu-btn-search font-16 color-grey" id="search"><i class="fa fa-search"></i></a>
       </div>
     </div>
@@ -36,7 +36,7 @@
         var search = $("#search_name").val();
         var type = $("input[name='type']").val();
         $.ajax({
-          url: "/libraries",
+          url: "<%= libraries_path %>",
           dataType: 'script',
           data: {search: search, type: type}
         });
diff --git a/app/views/libraries/show.html.erb b/app/views/libraries/show.html.erb
index 5b196712..9de5e65e 100644
--- a/app/views/libraries/show.html.erb
+++ b/app/views/libraries/show.html.erb
@@ -1,5 +1,5 @@
 <%
-  admin_or_self = User.current.admin? || @library.user_id == User.current.id
+  admin_or_self = admin_or_business? || @library.user_id == User.current.id
 %>
 <div class="educontent mb50">
   <p class="mt10 mb20 clearfix lineh-20">
@@ -42,7 +42,11 @@
     <div class="padding30">
       <p class="mb10 clearfix">
         <span class="color-grey-6 font-16 mr10">详情</span>
-        <% if admin_or_self && @library.editable? %>
+        <% if admin_or_business? || @library.user_id == User.current.id && @Library.pending? %>
+          <%= link_to '删除', 'javascript:void(0);', data: { id: @library.id },
+                      class: 'white-btn edu-blueline-btn fr ml20 delete-btn' %>
+        <% end %>
+        <% if admin_or_self %>
           <%= link_to '编辑', edit_library_path(id: @library.id), class: 'white-btn edu-blueline-btn fr' %>
         <% end %>
       </p>
@@ -99,13 +103,35 @@
         sequenceDiagram: true // 默认不解析
     });
     $(function(){
+      // 删除
+      $('.delete-btn').on('click', function(){
+        var id = $(this).data('id');
+        op_confirm_tip_1("是否确认删除？", "destroyLibrary(" + id + ");")
+      });
+
+      if ($('#private_reason_ul').length != 0) {
         var height=document.getElementById("private_reason_ul").offsetHeight;
         var one=parseInt($("#private_reason_ul").find("li").eq(0).height())+10;
         var two=parseInt($("#private_reason_ul").find("li").eq(1).height());
         var plus=one+two;
         if(parseInt(height)>166){
-            $("#actionPanel").html('点击展开<i class="iconfont icon-xiajiantou color-blue font-14 ml5"></i>');
-            $(".private_reason").css({maxHeight:plus+"px"});
+          $("#actionPanel").html('点击展开<i class="iconfont icon-xiajiantou color-blue font-14 ml5"></i>');
+          $(".private_reason").css({maxHeight:plus+"px"});
         }
+      }
     })
+
+    function destroyLibrary (id) {
+      $.ajax({
+        type: "DELETE",
+        url: "<%= libraries_path %>/" + id,
+        success: function (data) {
+          if(data && data.status == 0){
+            notice_box_redirect("<%= libraries_path %>", "删除成功");
+          } else {
+            notice_box(data.message);
+          }
+        }
+      });
+    }
 </script>
\ No newline at end of file