diff --git a/adc-da-report/src/main/java/com/adc/da/report/service/impl/IReportServiceImpl.java b/adc-da-report/src/main/java/com/adc/da/report/service/impl/IReportServiceImpl.java
index a0de580..c51eb97 100644
--- a/adc-da-report/src/main/java/com/adc/da/report/service/impl/IReportServiceImpl.java
+++ b/adc-da-report/src/main/java/com/adc/da/report/service/impl/IReportServiceImpl.java
@@ -322,6 +322,10 @@ public class IReportServiceImpl implements IReportService {
                 break;
         }
         FileUtil.deleteFile(path);
+        if (StringUtils.isNotBlank(html)){
+            html = html.replaceAll("<img ", "<img class ='preview-img' ");
+            html = html.replaceAll("img \\{", ".preview-img {");
+        }
         return html;
     }
 }