diff --git a/app/controllers/exercise_controller.rb b/app/controllers/exercise_controller.rb
index 810c61533..75c158435 100644
--- a/app/controllers/exercise_controller.rb
+++ b/app/controllers/exercise_controller.rb
@@ -146,7 +146,7 @@ class ExerciseController < ApplicationController
     if @exercise_questions.save
       standart_answer = ExerciseStandardAnswer.new
       standart_answer.exercise_question_id =  @exercise_questions.id
-      @exercise_questions.question_type == 3 ? standart_answer.answer_text = translate_standard_answer(params[:exercise_choice]) : standart_answer.exercise_choice_id = translate_standard_answer(params[:exercise_choice])
+      @exercise_questions.question_type == 3 ? standart_answer.answer_text = translate_standard_answer(params[:exercise_choice]) : standart_answer.exercise_choice_id = sigle_selection_standard_answer(params[:exercise_choice])
       standart_answer.save
       respond_to do |format|
         format.js
@@ -205,7 +205,6 @@ class ExerciseController < ApplicationController
     end
   end
 
-
   #发布问卷
   def publish_excercise
     @exercise.exercise_status = 2
diff --git a/app/helpers/exercise_helper.rb b/app/helpers/exercise_helper.rb
index 339861730..a0e76cbdb 100644
--- a/app/helpers/exercise_helper.rb
+++ b/app/helpers/exercise_helper.rb
@@ -2,8 +2,19 @@
 module ExerciseHelper
 
   # 单选
-  def translate_standard_answer(params)
-    answer = params.ord - 64
+  def sigle_selection_standard_answer(params)
+    size = params.ord - 64
+    # 输入的为小写字母答案
+    if size > 0
+      answer = params.ord - 96
+    else
+      answer = params.ord
+    end
+  end
+
+  # 多选
+  def multiselect_standard_answer(params)
+    answer = params.ord
   end
 
   #判断用户是否已经提交了问卷