diff --git a/visa/visa-server/src/main/java/cn/axzo/nanopart/visa/server/service/ChangeRecordBillService.java b/visa/visa-server/src/main/java/cn/axzo/nanopart/visa/server/service/ChangeRecordBillService.java
index 6cbb647f..7c97018a 100644
--- a/visa/visa-server/src/main/java/cn/axzo/nanopart/visa/server/service/ChangeRecordBillService.java
+++ b/visa/visa-server/src/main/java/cn/axzo/nanopart/visa/server/service/ChangeRecordBillService.java
@@ -48,4 +48,12 @@ public interface ChangeRecordBillService {
      */
     List<ChangeRecordBill> findMainBill(VisaBillTypeEnum billType, List<Long> billIds);
 
+    /**
+     * 获取任务单的主单据
+     *
+     * @param taskNos 任务单单号
+     * @return 主单据信息
+     */
+    List<ChangeRecordBill> findTaskMainBill(List<String> taskNos);
+
 }
diff --git a/visa/visa-server/src/main/java/cn/axzo/nanopart/visa/server/service/impl/ChangeRecordBillServiceImpl.java b/visa/visa-server/src/main/java/cn/axzo/nanopart/visa/server/service/impl/ChangeRecordBillServiceImpl.java
index 25a79e72..0d82d487 100644
--- a/visa/visa-server/src/main/java/cn/axzo/nanopart/visa/server/service/impl/ChangeRecordBillServiceImpl.java
+++ b/visa/visa-server/src/main/java/cn/axzo/nanopart/visa/server/service/impl/ChangeRecordBillServiceImpl.java
@@ -1,6 +1,5 @@
 package cn.axzo.nanopart.visa.server.service.impl;
 
-import cn.axzo.basics.common.util.AssertUtil;
 import cn.axzo.nanopart.visa.api.enums.VisaBillTypeEnum;
 import cn.axzo.nanopart.visa.server.domain.ChangeRecordBill;
 import cn.axzo.nanopart.visa.server.dto.VisaBillDto;
@@ -11,10 +10,12 @@ import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
 import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
 import lombok.RequiredArgsConstructor;
 import lombok.extern.slf4j.Slf4j;
+import org.apache.commons.collections.CollectionUtils;
 import org.apache.commons.compress.utils.Lists;
 import org.apache.commons.lang3.StringUtils;
 import org.springframework.stereotype.Service;
 
+import java.util.Collections;
 import java.util.List;
 import java.util.Objects;
 
@@ -79,12 +80,20 @@ public class ChangeRecordBillServiceImpl extends ServiceImpl<ChangeRecordBillDao
 
     @Override
     public List<ChangeRecordBill> findMainBill(VisaBillTypeEnum billType, List<Long> billIds) {
-        AssertUtil.notNull(billType, "单据类型不能为空");
-        AssertUtil.notEmpty(billIds, "单据Id不能为空");
+        if (Objects.isNull(billIds) || CollectionUtils.isEmpty(billIds)) {
+            return Collections.emptyList();
+        }
         return lambdaQuery().in(ChangeRecordBill::getBillId, billIds)
                 .eq(ChangeRecordBill::getBillType, billType)
                 .eq(ChangeRecordBill::getIsDelete, 0)
-                .orderByDesc(ChangeRecordBill::getUpdateAt)
+                .list();
+    }
+
+    @Override
+    public List<ChangeRecordBill> findTaskMainBill(List<String> taskNos) {
+        return lambdaQuery().in(ChangeRecordBill::getBillNo, taskNos)
+                .eq(ChangeRecordBill::getBillType, VisaBillTypeEnum.TASK)
+                .eq(ChangeRecordBill::getIsDelete, 0)
                 .list();
     }
 
diff --git a/visa/visa-server/src/main/java/cn/axzo/nanopart/visa/server/service/impl/ChangeRecordServiceImpl.java b/visa/visa-server/src/main/java/cn/axzo/nanopart/visa/server/service/impl/ChangeRecordServiceImpl.java
index fc1e8437..509ad110 100644
--- a/visa/visa-server/src/main/java/cn/axzo/nanopart/visa/server/service/impl/ChangeRecordServiceImpl.java
+++ b/visa/visa-server/src/main/java/cn/axzo/nanopart/visa/server/service/impl/ChangeRecordServiceImpl.java
@@ -1185,26 +1185,20 @@ public class ChangeRecordServiceImpl extends ServiceImpl<ChangeRecordDao, Change
         // 关联单据合法性
         if (CollUtil.isNotEmpty(req.getRelationOrderMap())) {
             req.getRelationOrderMap().forEach((key, value) -> {
+                // 关联单据数量限制
+                AssertUtil.isTrue(value.size() <= refreshableConfiguration.getVerifyVisaLimit(),
+                        String.format("最多可关联%d个%s单，请重新选择", refreshableConfiguration.getVerifyVisaLimit(), VisaBillTypeEnum.valueOf(key).getDesc()));
                 if (Objects.equals(VisaRelationFieldEnum.TASK_ORDER.name(), key)) {
                     /*任务单*/
-                    // 关联单据数量限制
-                    AssertUtil.isTrue(value.size() <= refreshableConfiguration.getVerifyVisaLimit(),
-                            String.format("最多可关联%d个变更单，请重新选择", refreshableConfiguration.getVerifyVisaLimit()));
-                    List<Long> billIds = value.stream().map(VisaChangeTempCreateReq.OrderSimpleModel::getId).collect(Collectors.toList());
-                    validBillIfRelated(VisaBillTypeEnum.TASK, billIds, req.getType());
+                    List<String> taskNos = value.stream().map(VisaChangeTempCreateReq.OrderSimpleModel::getNo).collect(Collectors.toList());
+                    validTaskBillIfRelated(taskNos, req.getType());
                 } else if (Objects.equals(VisaRelationFieldEnum.RECTIFICATION_ORDER.name(), key)) {
                     /*整改单*/
-                    // 关联单据数量限制
-                    AssertUtil.isTrue(value.size() <= refreshableConfiguration.getVerifyVisaLimit(),
-                            String.format("最多可关联%d个变更单，请重新选择", refreshableConfiguration.getVerifyVisaLimit()));
                     List<Long> billIds = value.stream().map(VisaChangeTempCreateReq.OrderSimpleModel::getId).collect(Collectors.toList());
                     validBillIfRelated(VisaBillTypeEnum.RECTIFY, billIds, req.getType());
                 } else if (Objects.equals(VisaRelationFieldEnum.VISA_ORDER.name(), key)) {
                     /*变更单*/
                     AssertUtil.isTrue(VisaTypeEnum.TECHNOLOGY_APPROVED.equals(req.getType()) || VisaTypeEnum.PROJECT_VISA.equals(req.getType()), "变更单关联单据仅支持技术核定/工程签证");
-                    // 关联单据数量限制
-                    AssertUtil.isTrue(value.size() <= refreshableConfiguration.getVerifyVisaLimit(),
-                            String.format("最多可关联%d个变更单，请重新选择", refreshableConfiguration.getVerifyVisaLimit()));
                     // 关联单据合法性，是否存在，状态是否合法
                     List<Long> billIds = value.stream().map(VisaChangeTempCreateReq.OrderSimpleModel::getId).collect(Collectors.toList());
                     List<ChangeRecord> relationVisa = listByIds(billIds);
@@ -1245,6 +1239,21 @@ public class ChangeRecordServiceImpl extends ServiceImpl<ChangeRecordDao, Change
                         }));
     }
 
+    private void validTaskBillIfRelated(List<String> taskNos, VisaTypeEnum visaType) {
+        AssertUtil.notEmpty(taskNos, "关联单据Id不能为空");
+        AssertUtil.notNull(visaType, "单据类型不能为空");
+        List<ChangeRecordBill> mainBill = changeRecordBillService.findTaskMainBill(taskNos);
+        mainBill.stream()
+                .collect(Collectors.groupingBy(ChangeRecordBill::getBillNo))
+                .forEach((k, v) -> v.stream()
+                        .filter(m -> Objects.equals(m.getVisaType(), visaType))
+                        .findAny()
+                        .ifPresent(m -> {
+                            log.info("{} bill {} is related by {} visa {}", m.getBillType(), m.getBillId(), m.getVisaType(), m.getVisaId());
+                            throw new ServiceException(String.format("单据%s已被其他单据关联，请重新选择", m.getBillNo()));
+                        }));
+    }
+
     /**
      * 通过变更签证Id获取Entity
      *