diff --git a/app/controllers/memos_controller.rb b/app/controllers/memos_controller.rb
index a4d72371c..b80bfed32 100644
--- a/app/controllers/memos_controller.rb
+++ b/app/controllers/memos_controller.rb
@@ -144,7 +144,7 @@ class MemosController < ApplicationController
   def reply
     tip_exception("parent_id不能为空") if params[:parent_id].blank?
     tip_exception("content不能为空") if params[:content].blank?
-    tip_exception("内容不能超过1000字符") if params[:content].length > 1000
+    tip_exception("内容不能超过2000字符") if params[:content].length > 2000
 
     ActiveRecord::Base.transaction do
       begin
diff --git a/app/controllers/messages_controller.rb b/app/controllers/messages_controller.rb
index 7b096f1ec..2b9d9d69f 100644
--- a/app/controllers/messages_controller.rb
+++ b/app/controllers/messages_controller.rb
@@ -63,7 +63,7 @@ class MessagesController < ApplicationController
 
   def reply
     return normal_status(2, "回复内容不能为空") if params[:content].blank?
-    return normal_status(2, "回复内容不能超过1000字符") if params[:content].length > 1000
+    return normal_status(2, "回复内容不能超过2000字符") if params[:content].length > 2000
     @reply = Message.create!(board: @message.board, root_id: @message.root_id || @message.id,
                              author: current_user, parent: @message,
                              message_detail_attributes: {
diff --git a/app/models/discuss.rb b/app/models/discuss.rb
index b563a6295..a4c833b55 100644
--- a/app/models/discuss.rb
+++ b/app/models/discuss.rb
@@ -13,7 +13,7 @@ class Discuss < ApplicationRecord
   belongs_to :challenge, optional: true
   validate :validate_sensitive_string
 
-  validates :content, length: { maximum: 1000, too_long: "不能超过1000个字符" }
+  validates :content, length: { maximum: 2000, too_long: "不能超过2000个字符" }
 
   after_create :send_tiding
 
diff --git a/app/models/graduation_work_score.rb b/app/models/graduation_work_score.rb
index 5c2627c88..78c2727fc 100644
--- a/app/models/graduation_work_score.rb
+++ b/app/models/graduation_work_score.rb
@@ -5,5 +5,5 @@ class GraduationWorkScore < ApplicationRecord
   belongs_to :graduation_task
   has_many :attachments, as: :container, dependent: :destroy
 
-  validates :comment, length: { maximum: 1000, too_long: "不能超过1000个字符" }
+  validates :comment, length: { maximum: 2000, too_long: "不能超过2000个字符" }
 end
diff --git a/app/models/hack_set.rb b/app/models/hack_set.rb
index e2ca60549..2c21c3c22 100644
--- a/app/models/hack_set.rb
+++ b/app/models/hack_set.rb
@@ -1,6 +1,6 @@
 class HackSet < ApplicationRecord
-  validates_length_of :input, maximum: 1000, message: "不能超过5000个字符"
-  validates_length_of :output, maximum: 1000, message: "不能超过5000个字符"
+  validates_length_of :input, maximum: 1000, message: "不能超过1000个字符"
+  validates_length_of :output, maximum: 1000, message: "不能超过1000个字符"
   validates :input, presence: { message: "测试集输入不能为空" }
   validates :output, presence: { message: "测试集输出不能为空" }
   validates_uniqueness_of :input, scope: [:hack_id, :input], message: "多个测试集的输入不能相同"
diff --git a/app/models/journals_for_message.rb b/app/models/journals_for_message.rb
index 190fa4351..3d0189c91 100644
--- a/app/models/journals_for_message.rb
+++ b/app/models/journals_for_message.rb
@@ -26,7 +26,7 @@ class JournalsForMessage < ApplicationRecord
   # "is_comprehensive_evaluation",  # 1 教师评论、2 匿评、3 留言
   # "hidden", 隐藏、
 
-  validates :notes, length: { maximum: 1000, too_long: "不能超过1000个字符" }
+  validates :notes, length: { maximum: 2000, too_long: "不能超过2000个字符" }
 
   after_create :send_tiding
 
diff --git a/app/models/student_works_score.rb b/app/models/student_works_score.rb
index dec4512a8..a193d4e77 100644
--- a/app/models/student_works_score.rb
+++ b/app/models/student_works_score.rb
@@ -7,7 +7,7 @@ class StudentWorksScore < ApplicationRecord
   has_many :tidings, as: :container, dependent: :destroy
   has_many :attachments, as: :container, dependent: :destroy
 
-  validates :comment, length: { maximum: 1000, too_long: "不能超过1000个字符" }
+  validates :comment, length: { maximum: 2000, too_long: "不能超过2000个字符" }
 
   scope :shixun_comment, lambda { where(is_ultimate: 0) }