diff --git a/servers/boe-server-all/src/main/java/com/xboe/module/exam/api/ExamQuestionApi.java b/servers/boe-server-all/src/main/java/com/xboe/module/exam/api/ExamQuestionApi.java
index e9eb6b59..fc6a2fb7 100644
--- a/servers/boe-server-all/src/main/java/com/xboe/module/exam/api/ExamQuestionApi.java
+++ b/servers/boe-server-all/src/main/java/com/xboe/module/exam/api/ExamQuestionApi.java
@@ -312,14 +312,19 @@ public class ExamQuestionApi extends ApiBaseController {
                     if(row1.getCell(1).getStringCellValue().equals("多选题")){
                         examQuestion.setType(2);
                     }
-                    if(row1.getCell(2).getStringCellValue().equals("中")){
-                        examQuestion.setDifficulty(2f);
-                    }else if(row1.getCell(2).getStringCellValue().equals("难")){
-                        examQuestion.setDifficulty(3f);
-                    } else if(row1.getCell(2).getStringCellValue().equals("易")){
-                        examQuestion.setDifficulty(1f);
-                    }else  if(row1.getCell(2).getStringCellValue().equals("")){
+
+                    if (row1.getCell(2).getStringCellValue() == null  || row1.getCell(2).getStringCellValue().equals("")){
                         examQuestion.setDifficulty(null);
+                    }else{
+                        if( row1.getCell(2).getStringCellValue().equals("中")){
+                            examQuestion.setDifficulty(2f);
+                        }else if(row1.getCell(2).getStringCellValue().equals("难")){
+                            examQuestion.setDifficulty(3f);
+                        } else if(row1.getCell(2).getStringCellValue().equals("易")){
+                            examQuestion.setDifficulty(1f);
+                        }else  if(row1.getCell(2).getStringCellValue().equals("")){
+                            examQuestion.setDifficulty(null);
+                        }
                     }
                     Cell cell = row1.getCell(3);
                     cell.setCellType(CellType.STRING);