diff --git a/src/main/java/com/yem/wm/im/debcrednotenew/validator/DebCredNewUnAuditValidator.java b/src/main/java/com/yem/wm/im/debcrednotenew/validator/DebCredNewUnAuditValidator.java
index fc56613c..8a0beb93 100644
--- a/src/main/java/com/yem/wm/im/debcrednotenew/validator/DebCredNewUnAuditValidator.java
+++ b/src/main/java/com/yem/wm/im/debcrednotenew/validator/DebCredNewUnAuditValidator.java
@@ -7,6 +7,8 @@ import kd.bos.orm.query.QCP;
 import kd.bos.orm.query.QFilter;
 import kd.bos.servicehelper.BusinessDataServiceHelper;
 
+import java.math.BigDecimal;
+
 /**
  * @author ljw
  * @date 2024/12/23 17:43
@@ -21,10 +23,21 @@ public class DebCredNewUnAuditValidator extends AbstractValidator {
             DynamicObject dataEntity = dataEntitie.getDataEntity();
             String billno = dataEntity.getString("billno");
             if (billno.length()>4){
+                BigDecimal bigDecimal = BigDecimal.ZERO;
                 String modifiedString = billno.substring(0, billno.length() - 4);
+                String substringed = billno.substring(billno.length() - 4);
                 DynamicObject[] loaded = BusinessDataServiceHelper.load("yem_debcrednote", "id,billno", new QFilter[]{new QFilter("billno", QCP.in, modifiedString + "%")});
                 for (DynamicObject dynamicObject : loaded) {
-
+                    String dynamicObjectString = dynamicObject.getString("billno");
+                    String substring = dynamicObjectString.substring(dynamicObjectString.length() - 4);
+                    BigDecimal decimal = BigDecimal.valueOf(Double.parseDouble(substring));
+                    if (decimal.compareTo(bigDecimal)>0){
+                        bigDecimal = decimal;
+                    }
+                }
+                BigDecimal decimal = BigDecimal.valueOf(Double.parseDouble(substringed));
+                if (decimal.compareTo(bigDecimal)!=0){
+                    this.addMessage(dataEntitie,"当前单不是最大单号，请从最大单号开始删除！！！");
                 }
             }
         }