diff --git a/backend/src/main/java/io/metersphere/log/utils/ReflexObjectUtil.java b/backend/src/main/java/io/metersphere/log/utils/ReflexObjectUtil.java
index c8e795884a..256a1cded0 100644
--- a/backend/src/main/java/io/metersphere/log/utils/ReflexObjectUtil.java
+++ b/backend/src/main/java/io/metersphere/log/utils/ReflexObjectUtil.java
@@ -153,16 +153,27 @@ public class ReflexObjectUtil {
                             GsonDiff diff = new GsonDiff();
                             Object originalValue = originalColumns.get(i).getOriginalValue();
                             Object newValue = newColumns.get(i).getOriginalValue();
-                            List<String> originalValueArray = JSON.parseArray(originalValue.toString(), String.class);
+                            String oldTags = null;
+                            if (originalValue != null && !StringUtils.equals("null", originalValue.toString())) {
+                                List<String> originalValueArray = JSON.parseArray(originalValue.toString(), String.class);
+                                Collections.sort(originalValueArray);
+                                Object originalObject = JSON.toJSON(originalValueArray);
+                                oldTags = ApiDefinitionDiffUtil.JSON_START + ((originalColumns.get(i) != null && originalObject != null) ? originalObject.toString() : "\"\"") + ApiDefinitionDiffUtil.JSON_END;
+                            }
                             List<String> newValueArray = JSON.parseArray(newValue.toString(), String.class);
-                            Collections.sort(originalValueArray);
                             Collections.sort(newValueArray);
-                            Object originalObject = JSON.toJSON(originalValueArray);
                             Object newObject = JSON.toJSON(newValueArray);
-                            String oldTags = ApiDefinitionDiffUtil.JSON_START + ((originalColumns.get(i) != null && originalObject != null) ? originalObject.toString() : "\"\"") + ApiDefinitionDiffUtil.JSON_END;
                             String newTags = ApiDefinitionDiffUtil.JSON_START + ((newColumns.get(i) != null && newObject != null) ? newObject.toString() : "\"\"") + ApiDefinitionDiffUtil.JSON_END;
-                            String diffStr = diff.diff(oldTags, newTags);
-                            String diffValue = diff.apply(newTags, diffStr);
+                            String diffValue;
+                            if (oldTags != null) {
+                                String diffStr = diff.diff(oldTags, newTags);
+                                diffValue = diff.apply(newTags, diffStr);
+                            } else {
+                                int indexAdd = newTags.indexOf("[");
+                                String substring = newTags.substring(0, indexAdd + 2);
+                                String substring1 = newTags.substring(indexAdd + 2);
+                                diffValue = substring + "++" + substring1;
+                            }
                             column.setDiffValue(diffValue);
                         }
                         // 深度对比