diff --git a/laws-modules/src/main/java/com/jero/modules/laws/documenttool/service/impl/DocumentSplitServiceImpl.java b/laws-modules/src/main/java/com/jero/modules/laws/documenttool/service/impl/DocumentSplitServiceImpl.java
index 7ae35c33..99b81aa5 100644
--- a/laws-modules/src/main/java/com/jero/modules/laws/documenttool/service/impl/DocumentSplitServiceImpl.java
+++ b/laws-modules/src/main/java/com/jero/modules/laws/documenttool/service/impl/DocumentSplitServiceImpl.java
@@ -1513,12 +1513,14 @@ public class DocumentSplitServiceImpl implements IDocumentSplitService {
     private String mergeData2(List<Map<String, Object>> listMap, String key, boolean isDistinct) {
         List<String> list = new ArrayList<>();
         for (Map<String, Object> map : listMap) {
-            String[] split = map.get(key).toString().split(",");
-            for (String s : split) {
-                if (isDistinct && list.contains(s)){
-                    continue;
+            if (map.containsKey(key)){
+                String[] split = map.get(key).toString().split(",");
+                for (String s : split) {
+                    if (isDistinct && list.contains(s)){
+                        continue;
+                    }
+                    list.add(s);
                 }
-                list.add(s);
             }
         }
         return String.join(",", list);