diff --git a/app/controllers/pull_requests_controller.rb b/app/controllers/pull_requests_controller.rb
index 1699cf608..50e904565 100644
--- a/app/controllers/pull_requests_controller.rb
+++ b/app/controllers/pull_requests_controller.rb
@@ -87,8 +87,10 @@ class PullRequestsController < ApplicationController
 
           if @issue.update_attributes(@issue_params)
             if @pull_request.update_attributes(@local_params.compact)
-              gitea_request = Gitea::PullRequest::UpdateService.new(@project.owner, @repository.try(:identifier), @requests_params, @pull_request.try(:gpid)).call
-              if gitea_request
+              gitea_pull = Gitea::PullRequest::UpdateService.call(@owner.login, @repository.identifier,
+                  @pull_request.gpid, @requests_params, current_user.gitea_token)
+
+              if gitea_pull[:status] === :success
                 if params[:issue_tag_ids].present?
                   params[:issue_tag_ids].each do |tag|
                     IssueTagsRelate.create(issue_id: @issue.id, issue_tag_id: tag)
@@ -117,9 +119,8 @@ class PullRequestsController < ApplicationController
   def refuse_merge
     ActiveRecord::Base.transaction do
       begin
-        @pull_request.update(status: 2)
-        @pull_request.issue.update(status_id: 5)
-        normal_status(1, "已拒绝")
+        colsed = PullRequests::CloseService.call(@owner, @repository, @pull_request, current_user)
+        colsed === true ? normal_status(1, "已拒绝") : normal_status(-1, '合并失败')
       rescue => e
         normal_status(-1, e.message)
         raise ActiveRecord::Rollback
@@ -145,15 +146,10 @@ class PullRequestsController < ApplicationController
     else
       ActiveRecord::Base.transaction do
         begin
-          requests_params = {
-            Do: params[:do],
-            MergeMessageField: params[:body],
-            MergeTitleField: params[:title]
-          }
-          merge_pr = Gitea::PullRequest::MergeService.call(current_user.gitea_token, @project.owner.login,
-            @repository.try(:identifier), @pull_request.try(:gpid), requests_params)
-          if @pull_request.update_attribute(:status, 1) && merge_pr[:status].to_i == 200
-            @pull_request&.project_trends&.update_all(action_type: "close")
+          result = PullRequests::MergeService.call(@owner, @repository, @pull_request, current_user, params)
+
+          if result && @pull_request.merge!
+            @pull_request.project_trend_status!
             @issue&.custom_journal_detail("merge", "", "该合并请求已被合并", current_user&.id)
             normal_status(1, "合并成功")
           else
diff --git a/app/models/issue_status.rb b/app/models/issue_status.rb
index a7ec34f8a..a58346ea7 100644
--- a/app/models/issue_status.rb
+++ b/app/models/issue_status.rb
@@ -17,6 +17,13 @@
 #
 
 class IssueStatus < ApplicationRecord
+  ADD      = 1
+  SOLVING  = 2
+  SOLVED   = 3
+  FEEDBACK = 4
+  CLOSED   = 5
+  REJECTED = 6
+
   has_many :issues
   belongs_to :project, optional: true
 end
diff --git a/app/models/project_trend.rb b/app/models/project_trend.rb
index 5858768b9..8c55c4f94 100644
--- a/app/models/project_trend.rb
+++ b/app/models/project_trend.rb
@@ -18,6 +18,9 @@
 #
 
 class ProjectTrend < ApplicationRecord
+  CLOSE  = 'close'
+  CREATE = 'create'
+
   belongs_to :project
   belongs_to :trend, polymorphic: true, optional: true
   belongs_to :user
diff --git a/app/models/pull_request.rb b/app/models/pull_request.rb
index 046e9a0a4..cf057c3f2 100644
--- a/app/models/pull_request.rb
+++ b/app/models/pull_request.rb
@@ -24,7 +24,11 @@
 #
 
 class PullRequest < ApplicationRecord
-  #status 0 默认未合并， 1表示合并, 2表示请求拒绝
+  #status 0 默认未合并， 1表示合并, 2表示请求拒绝(或已关闭)
+  OPEN   = 0
+  MERGED  = 1
+  CLOSED = 2
+
   belongs_to :issue
   belongs_to :user
   belongs_to :project, :counter_cache => true
@@ -42,6 +46,14 @@ class PullRequest < ApplicationRecord
     update_column(:gpid, gitea_pull_number)
   end
 
+  def merge!
+    update_column(:status, PullRequest::MERGED)
+  end
+
+  def project_trend_status!
+    self&.project_trends&.update_all(action_type: ProjectTrend::CLOSE)
+  end
+
   # TODO: sync educoder platform repo's for update some statistics count
   def self.update_some_count
     PullRequest.includes(:user, :project).select(:id, :user_id, :gpid, :project_id, :fork_project_id).each do |pr|
diff --git a/app/services/gitea/pull_request/close_service.rb b/app/services/gitea/pull_request/close_service.rb
new file mode 100644
index 000000000..aed5251b7
--- /dev/null
+++ b/app/services/gitea/pull_request/close_service.rb
@@ -0,0 +1,22 @@
+class Gitea::PullRequest::CloseService < Gitea::PullRequest::UpdateService
+  attr_reader :owner, :repo, :base, :number, :token
+
+  # params:
+  #   owner: owner of the repo
+  #   repo: name of the repo
+  #   base: branch name of base
+  #   number: number of pull request
+  #   token: token of gitea user
+  # eq:
+  # Gitea::PullRequest::CloseService.call(owner.login, repo.identifier, pull.gpid, pull.base, current_user.gitea_token)
+  def initialize(owner, repo, number, base,token=nil)
+    colse_pull_params = Hash.new.merge(base: base, state: 'closed').compact
+
+    super(owner, repo, number, colse_pull_params, token)
+  end
+
+  def call
+    super
+  end
+
+end
diff --git a/app/services/gitea/pull_request/merge_service.rb b/app/services/gitea/pull_request/merge_service.rb
index 2129bbeaf..c33c8781d 100644
--- a/app/services/gitea/pull_request/merge_service.rb
+++ b/app/services/gitea/pull_request/merge_service.rb
@@ -18,7 +18,9 @@ class Gitea::PullRequest::MergeService < Gitea::ClientService
   end
 
   def call
-    post(url, request_params)
+    response = post(url, request_params)
+
+    render_200_no_body(response)
   end
 
   private
@@ -27,7 +29,6 @@ class Gitea::PullRequest::MergeService < Gitea::ClientService
   end
 
   def request_params
-    Hash.new.merge(token: token, data: params)
+    Hash.new.merge(token: token, data: params.compact)
   end
-
 end
diff --git a/app/services/gitea/pull_request/open_service.rb b/app/services/gitea/pull_request/open_service.rb
new file mode 100644
index 000000000..affdfe112
--- /dev/null
+++ b/app/services/gitea/pull_request/open_service.rb
@@ -0,0 +1,22 @@
+class Gitea::PullRequest::OpenService < Gitea::PullRequest::UpdateService
+  attr_reader :owner, :repo, :base, :number, :token
+
+  # params:
+  #   owner: owner of the repo
+  #   repo: name of the repo
+  #   base: branch name of base
+  #   number: number of pull request
+  #   token: token of gitea user
+  # eq:
+  # Gitea::PullRequest::OpenService.new(owner.login, repo.identifier, pr.gpid, pr.base, current_user.gitea_token)
+  def initialize(owner, repo, number, base, token=nil)
+    open_pull_params = Hash.new.merge(base: base, state: 'open').compact
+
+    super(owner, repo, number, open_pull_params, token)
+  end
+
+  def call
+    super
+  end
+
+end
diff --git a/app/services/gitea/pull_request/update_service.rb b/app/services/gitea/pull_request/update_service.rb
index a83afe40b..a68981f29 100644
--- a/app/services/gitea/pull_request/update_service.rb
+++ b/app/services/gitea/pull_request/update_service.rb
@@ -1,26 +1,54 @@
 class Gitea::PullRequest::UpdateService < Gitea::ClientService
-  attr_reader :user, :repo, :params,:pull_request_id
+  attr_reader :owner, :repo, :params, :number, :token
 
-
-  def initialize(user, repo, params,pull_request_id)
-    @user   = user
+  # params:
+  # {
+  #   "assignee": "string",
+  #   "assignees": [
+  #     "string"
+  #   ],
+  #   "base": "string",
+  #   "body": "string",
+  #   "due_date": "2021-01-11T10:11:52.074Z",
+  #   "labels": [
+  #     0
+  #   ],
+  #   "milestone": 0,
+  #   "state": "string",
+  #   "title": "string",
+  #   "unset_due_date": true
+  # }
+  def initialize(owner, repo, number, params, token=nil)
+    @owner  = owner
     @repo   = repo
     @params = params
-    @pull_request_id = pull_request_id
+    @number = number
+    @token  = token
   end
 
   def call
-    put(url, request_params)
+    response = patch(url, request_params)
+
+    status, message, body = render_response(response)
+    json_format(status, message, body)
   end
 
   private
 
   def request_params
-    Hash.new.merge(token: @user.gitea_token, data: @params)
+    Hash.new.merge(token: token, data: @params)
   end
 
   def url
-    "/repos/#{@user.try(:login)}/#{@repo}/pulls/#{@pull_request_id}".freeze
+    "/repos/#{owner}/#{repo}/pulls/#{number}".freeze
+  end
+
+  def json_format(status, message, body)
+    case status
+    when 201 then success(body)
+    else
+      error(message, status)
+    end
   end
 
 end
diff --git a/app/services/pull_requests/close_service.rb b/app/services/pull_requests/close_service.rb
new file mode 100644
index 000000000..e0ac19b4e
--- /dev/null
+++ b/app/services/pull_requests/close_service.rb
@@ -0,0 +1,33 @@
+class PullRequests::CloseService < ApplicationService
+  attr_reader :owner, :repo, :pull, :current_user
+
+  # eq:
+  # PullRequests::CloseService.call(owner, repo, pull, current_user)
+  def initialize(owner, repo, pull, current_user)
+    @owner        = owner
+    @repo         = repo
+    @pull         = pull
+    @current_user = current_user
+  end
+
+  def call
+    ActiveRecord::Base.transaction do
+      return false if close_gitea_pull[:status] != :success
+
+      update_pull_status!
+      return true
+    end
+  end
+
+  private
+
+  def close_gitea_pull
+    Gitea::PullRequest::CloseService.call(@owner.login, @repo.identifier,
+      @pull.gpid, @pull.base, current_user.gitea_token)
+  end
+
+  def update_pull_status!
+    @pull.update(status: PullRequest::CLOSED)
+    @pull.issue.update(status_id: IssueStatus::CLOSED)
+  end
+end
diff --git a/app/services/pull_requests/merge_service.rb b/app/services/pull_requests/merge_service.rb
new file mode 100644
index 000000000..a20ee3aa9
--- /dev/null
+++ b/app/services/pull_requests/merge_service.rb
@@ -0,0 +1,36 @@
+class PullRequests::MergeService < ApplicationService
+  attr_reader :owner, :repo, :pull, :current_user, :params
+
+  # eq:
+  # PullRequests::MergeService.call(owner, repo, pull, current_user, params)
+  def initialize(owner, repo, pull, current_user, params)
+    @owner        = owner
+    @repo         = repo
+    @pull         = pull
+    @current_user = current_user
+    @params       = params
+  end
+
+  def call
+    ActiveRecord::Base.transaction do
+      gitea_pull_merge!
+    end
+  end
+
+  private
+
+  def gitea_pull_merge!
+    result = Gitea::PullRequest::MergeService.call(@current_user.gitea_token, @owner.login,
+      @repo.identifier, @pull.gpid, gitea_merge_pull_params)
+
+    result[:status] === 200 ? true : false
+  end
+
+  def gitea_merge_pull_params
+    {
+      Do: params[:do],
+      MergeMessageField: params[:body],
+      MergeTitleField: params[:title]
+    }
+  end
+end
diff --git a/app/services/pull_requests/open_service.rb b/app/services/pull_requests/open_service.rb
new file mode 100644
index 000000000..3081e52b5
--- /dev/null
+++ b/app/services/pull_requests/open_service.rb
@@ -0,0 +1,33 @@
+class PullRequests::OpenService < ApplicationService
+  attr_reader :owner, :repo, :pull, :current_user
+
+  # eq:
+  # PullRequests::OpenService.call(owner, repo, pull, current_user)
+  def initialize(owner, repo, pull, current_user)
+    @owner        = owner
+    @repo         = repo
+    @pull         = pull
+    @current_user = current_user
+  end
+
+  def call
+    ActiveRecord::Base.transaction do
+      return false if open_gitea_pull[:status] != :success
+
+      update_pull_status!
+      return true
+    end
+  end
+
+  private
+
+  def open_gitea_pull
+    Gitea::PullRequest::OpenService.call(@owner.login, @repo.identifier,
+      @pull.gpid, @pull.base, @current_user.gitea_token)
+  end
+
+  def update_pull_status!
+    @pull.update(status: PullRequest::OPEN)
+    @pull.issue.update(status_id: IssueStatus::SOLVING)
+  end
+end