diff --git a/src/main/java/com/nis/util/excel/XLSXCovertCSVReader.java b/src/main/java/com/nis/util/excel/XLSXCovertCSVReader.java
index 79f66204b..f16e5770a 100644
--- a/src/main/java/com/nis/util/excel/XLSXCovertCSVReader.java
+++ b/src/main/java/com/nis/util/excel/XLSXCovertCSVReader.java
@@ -293,7 +293,9 @@ public abstract class XLSXCovertCSVReader {
                     int len = countNullCell(refnum, preRefnum);  
                     for(int i=0;i<len;i++){  
                         rowlist.add(curCol, ""); 
-                        rowMap.put(thisColumn, "");
+                        if(!rowMap.containsKey(thisColumn)){
+                        	rowMap.put(thisColumn, "");
+                        }
                         curCol++;  
                     }  
                 }  
@@ -332,7 +334,9 @@ public abstract class XLSXCovertCSVReader {
                         int len = countNullCell(maxRefnum, refnum);  
                         for(int i=0;i<=len;i++){  
                             rowlist.add(curCol, ""); 
-                            //rowMap.put(thisColumn, "");
+                            if(!rowMap.containsKey(thisColumn)){
+                            	rowMap.put(thisColumn, "");
+                            }
                             curCol++;  
                         } 
                        int totalLen= countTotalCell(maxRefnum);