diff --git a/epmet-module/gov-voice/gov-voice-server/src/main/java/com/epmet/service/impl/SpecialSubjectServiceImpl.java b/epmet-module/gov-voice/gov-voice-server/src/main/java/com/epmet/service/impl/SpecialSubjectServiceImpl.java
index 785d2cc6a0..0ff3c6fe27 100644
--- a/epmet-module/gov-voice/gov-voice-server/src/main/java/com/epmet/service/impl/SpecialSubjectServiceImpl.java
+++ b/epmet-module/gov-voice/gov-voice-server/src/main/java/com/epmet/service/impl/SpecialSubjectServiceImpl.java
@@ -280,14 +280,16 @@ public class SpecialSubjectServiceImpl extends BaseServiceImpl<SpecialSubjectDao
     @Override
     public List<PreviewResultDTO> preview(PreviewFormDTO formDTO) {
         List<PreviewResultDTO> result = new ArrayList<>();
-        formDTO.getTagIdList().forEach(tagId -> {
-            PreviewResultDTO previewResultDTO = new PreviewResultDTO();
-            SpecialSubjectDTO subject = baseDao.getInfo(tagId);
-            previewResultDTO.setSpecialSubjectId(subject.getId());
-            previewResultDTO.setTagName(subject.getTagName());
-            previewResultDTO.setArticleList(articleService.getArticleListByTag(tagId, formDTO.getPageNo(), formDTO.getPageSize()));
-            result.add(previewResultDTO);
-        });
+        if (CollectionUtils.isNotEmpty(formDTO.getTagIdList())) {
+            formDTO.getTagIdList().forEach(tagId -> {
+                PreviewResultDTO previewResultDTO = new PreviewResultDTO();
+                SpecialSubjectDTO subject = baseDao.getInfo(tagId);
+                previewResultDTO.setSpecialSubjectId(subject.getId());
+                previewResultDTO.setTagName(subject.getTagName());
+                previewResultDTO.setArticleList(articleService.getArticleListByTag(tagId, formDTO.getPageNo(), formDTO.getPageSize()));
+                result.add(previewResultDTO);
+            });
+        }
         return result;
 
     }