diff --git a/backend/src/main/java/io/metersphere/track/validate/CustomFieldMemberValidator.java b/backend/src/main/java/io/metersphere/track/validate/CustomFieldMemberValidator.java
index ee2d01fa23..ddaca94398 100644
--- a/backend/src/main/java/io/metersphere/track/validate/CustomFieldMemberValidator.java
+++ b/backend/src/main/java/io/metersphere/track/validate/CustomFieldMemberValidator.java
@@ -32,8 +32,7 @@ public class CustomFieldMemberValidator extends AbstractCustomFieldValidator {
         if (StringUtils.isBlank(value)) {
             return;
         }
-        long count = userIdMap.entrySet().stream().filter(e -> StringUtils.equalsAnyIgnoreCase(value,e.getKey(),e.getValue())).count();
-        if(count > 0){
+        if (userIdMap.containsKey(value) || userNameMap.containsKey(value)) {
             return;
         }
         throw new CustomFieldValidateException(String.format(Translator.get("custom_field_member_tip"), customField.getName()));
diff --git a/backend/src/main/java/io/metersphere/track/validate/CustomFieldMultipleMemberValidator.java b/backend/src/main/java/io/metersphere/track/validate/CustomFieldMultipleMemberValidator.java
index 0471d0bc2b..5ca705671a 100644
--- a/backend/src/main/java/io/metersphere/track/validate/CustomFieldMultipleMemberValidator.java
+++ b/backend/src/main/java/io/metersphere/track/validate/CustomFieldMultipleMemberValidator.java
@@ -17,9 +17,9 @@ public class CustomFieldMultipleMemberValidator extends CustomFieldMemberValidat
         }
 
         for (String item : parse2Array(customField.getName(), value)) {
-            long count = userIdMap.entrySet().stream().filter(e -> StringUtils.equalsAnyIgnoreCase(item,e.getKey(),e.getValue())).count();
-            if(count > 0){
-                return;
+            item = item.toLowerCase();
+            if (!userIdMap.containsKey(item) && !userNameMap.containsKey(item)) {
+                CustomFieldValidateException.throwException(String.format(Translator.get("custom_field_member_tip"), customField.getName()));
             }
         }
         CustomFieldValidateException.throwException(String.format(Translator.get("custom_field_member_tip"), customField.getName()));