diff --git a/app/helpers/exercises_helper.rb b/app/helpers/exercises_helper.rb
index bacb95309..33d61d203 100644
--- a/app/helpers/exercises_helper.rb
+++ b/app/helpers/exercises_helper.rb
@@ -164,7 +164,7 @@ module ExercisesHelper
           question_answer_infos.push(answer_option)
         end
       elsif ex.question_type == Exercise::COMPLETION  #填空题
-        effictive_users_count = effictive_users.pluck(:user_id).uniq.size
+        effictive_users_count = effictive_users.where("answer_text is not null").pluck(:user_id).uniq.size
         ex_ordered = ex.is_ordered
         null_standard_answer = ex.exercise_standard_answers
         null_stand_choice = null_standard_answer.pluck(:exercise_choice_id)  #一个exercise_choice_id可能对应多个answer_text
@@ -214,7 +214,7 @@ module ExercisesHelper
 
         # percent = commit_user_ids > 0 ? (all_user_count / commit_user_ids.to_f).round(3)*100 : 0.0
         user_right_count = effictive_users.where("score > 0.0").pluck(:user_id).uniq
-        user_wrong_counts = effictive_users.where("score < 0.0").pluck(:user_id).uniq
+        user_wrong_counts = effictive_users.where("score < 0.0 and answer_text is not null").pluck(:user_id).uniq
         user_wrong_count = (user_wrong_counts - user_right_count).size
 
         if effictive_users_count > 0 && user_wrong_count >= 0