diff --git a/app/models/ec_course_student_score.rb b/app/models/ec_course_student_score.rb
index 5b45e34a9..57d524b46 100644
--- a/app/models/ec_course_student_score.rb
+++ b/app/models/ec_course_student_score.rb
@@ -1,7 +1,6 @@
 class EcCourseStudentScore < ApplicationRecord
   belongs_to :ec_year_student
   belongs_to :ec_course
-  belongs_to :ec_course_target
 
   has_many :ec_student_score_targets, dependent: :delete_all
 end
\ No newline at end of file
diff --git a/app/services/ecs/create_course_service.rb b/app/services/ecs/create_course_service.rb
index dba162189..3e3828c6f 100644
--- a/app/services/ecs/create_course_service.rb
+++ b/app/services/ecs/create_course_service.rb
@@ -27,7 +27,7 @@ class Ecs::CreateCourseService < ApplicationService
   private
 
   def create_default_score_levels!(ec_course)
-    EcScoreLevel.bulk_insert(:ec_course_id, :score, :level, :position) do |worker|
+    EcScoreLevel.bulk_insert(:ec_course_id, :score, :level, :position, :created_at, :updated_at) do |worker|
       [
         { ec_course_id: ec_course.id, score: 90, level: '优秀',   position: 1 },
         { ec_course_id: ec_course.id, score: 80, level: '良好',   position: 2 },
diff --git a/app/services/ecs/query_course_evaluation_service.rb b/app/services/ecs/query_course_evaluation_service.rb
index 8c76da438..22e0ce1f4 100644
--- a/app/services/ecs/query_course_evaluation_service.rb
+++ b/app/services/ecs/query_course_evaluation_service.rb
@@ -17,12 +17,12 @@ class Ecs::QueryCourseEvaluationService < ApplicationService
   end
 
   def graduation_subitem_evaluations
-    student_scores = ec_course.ec_course_student_scores.joins(:ec_course_target).group(:ec_course_target_id)
+    student_scores = ec_course.ec_course_student_scores.joins(ec_student_score_targets: :ec_course_target).group(:ec_course_target_id)
     student_scores = student_scores.select('AVG(score) as average_score, ec_course_target_id')
     student_score_map = student_scores.group_by { |item| item.ec_course_target_id }
 
     subitem_targets = ec_course.ec_graduation_subitem_course_targets
-                        .includes(ec_graduation_subitem: :ec_graduation_requirement)
+                        .includes(:ec_course_target, ec_graduation_subitem: :ec_graduation_requirement)
 
     subitem_targets.group_by(&:ec_graduation_subitem_id).map do |_id, arr|
       subitem = arr.first.ec_graduation_subitem
@@ -37,7 +37,7 @@ class Ecs::QueryCourseEvaluationService < ApplicationService
 
       arr.map(&:ec_course_target).uniq.each do |target|
         target_total_rates += target.weight.to_f
-        student_score = student_score_map[target.id]
+        student_score = student_score_map[target.id]&.first
 
         reach_real_target += student_score.average_score.to_f * target.weight.to_f if student_score
       end
@@ -60,8 +60,19 @@ class Ecs::QueryCourseEvaluationService < ApplicationService
 
   def score_levels_map
     @_score_levels_map ||= begin
+      index = 0
       ec_course.ec_score_levels.each_with_object({}) do |level, obj|
-        obj[level.id.to_s] = level.as_json(only: %i[id position score level])
+        hash = level.as_json(only: %i[id position score level])
+
+        hash[:description] =
+          case index
+          when 0 then "#{level.score}分以上"
+          when ec_course.ec_score_levels.to_a.size - 1 then "低于#{level.score}分"
+          else "#{level.score}~#{ec_course.ec_score_levels[index - 1].score - 1}分"
+          end
+
+        index += 1
+        obj[level.id.to_s] = hash
       end
     end
   end
@@ -87,23 +98,29 @@ class Ecs::QueryCourseEvaluationService < ApplicationService
       @_course_achievement += data[:average_score].to_f * course_target.weight.to_f
 
       # 计算学生成绩分布区间
+      student_count = 0
       data[:score_levels] = score_levels.map do |score_level|
         level_condition_proc =
           if (score_level.position - 1).zero? # 第一区间
             -> (score_target){ score_target.score >= score_level.score ? 1 : 0 }
-          elsif score_levels.position == score_levels.size # 末尾区间
+          elsif score_level.position == score_levels.size # 末尾区间
             -> (score_target){ score_target.score < score_level.score ? 1 : 0 }
           else
             # 中间区间
-            -> (score_target){ score_target.score >= score_level.score && score_target.score < score_targets[score_level.position - 1] ? 1 : 0 }
+            -> (score_target){ score_target.score >= score_level.score && score_target.score < score_levels[score_level.position - 1].score ? 1 : 0 }
           end
 
         # 计算该成绩区间人数
         count = score_targets.sum(&level_condition_proc)
+        student_count += count
 
         { id: score_level.id, count: count }
       end
 
+      data[:score_levels].each do |score_level|
+        score_level[:rate] = score_level[:count].fdiv(student_count).round(2)
+      end
+
       data
     end
   end