diff --git a/blade-third-party-api/blade-bfi-api/src/main/java/org/springblade/thirdparty/bfi/feign/IBfiClient.java b/blade-third-party-api/blade-bfi-api/src/main/java/org/springblade/thirdparty/bfi/feign/IBfiClient.java
index 454fc8cb..2c126bdf 100644
--- a/blade-third-party-api/blade-bfi-api/src/main/java/org/springblade/thirdparty/bfi/feign/IBfiClient.java
+++ b/blade-third-party-api/blade-bfi-api/src/main/java/org/springblade/thirdparty/bfi/feign/IBfiClient.java
@@ -30,6 +30,7 @@ import org.springblade.thirdparty.bfi.config.BfiFeignClientConfig;
 import org.springblade.thirdparty.bfi.constant.BfiConstant;
 import org.springblade.thirdparty.bfi.pojo.dto.BfiApBillSaveBodyDTO;
 import org.springblade.thirdparty.bfi.pojo.dto.BfiArBillSaveBodyDTO;
+import org.springblade.thirdparty.bfi.pojo.dto.BfiBillLockDTO;
 import org.springblade.thirdparty.bfi.pojo.dto.BfiBlacklistQueryDTO;
 import org.springblade.thirdparty.bfi.pojo.dto.BfiClaimPushBodyDTO;
 import org.springblade.thirdparty.bfi.pojo.dto.BfiCustomerSaveBodyDTO;
@@ -51,6 +52,7 @@ import org.springblade.thirdparty.bfi.pojo.vo.BfiApBillVO;
 import org.springblade.thirdparty.bfi.pojo.vo.BfiArBillVO;
 import org.springblade.thirdparty.bfi.pojo.vo.BfiBlacklistVO;
 import org.springblade.thirdparty.bfi.pojo.vo.BfiAttachmentUploadVO;
+import org.springblade.thirdparty.bfi.pojo.vo.BfiBillLockResultVO;
 import org.springblade.thirdparty.bfi.pojo.vo.BfiBillSaveResultVO;
 import org.springblade.thirdparty.bfi.pojo.vo.BfiClaimAnnounceVO;
 import org.springblade.thirdparty.bfi.pojo.vo.BfiCustomerVO;
@@ -114,6 +116,7 @@ public interface IBfiClient {
 	String INVOICE_DOWNLOAD_URL = "${thirdParty.bfi.invoiceDownloadUrl:/ierp/kapi/v2/awrp/bosext/attachment/download}";
 	String ATTACHMENT_UPLOAD_URL = "${thirdParty.bfi.attachmentUploadUrl:/ierp/kapi/v2/frame/attachment/uploadFile}";
 	String BLACKLIST_QUERY_URL = "${thirdParty.bfi.blacklistQueryUrl:/ierp/kapi/v2/awrp/bdm/bdm_blacklist_config/blacklistquery}";
+	String LOCK_BILL_URL = "${thirdParty.bfi.billLockUrl:/ierp/kapi/app/billLock/lockBusiData}";
 
 	/**
 	 * A100-1 获取令牌
@@ -488,4 +491,17 @@ public interface IBfiClient {
 	BfiResultVO<BfiAttachmentUploadVO> uploadAttachment(@RequestHeader(BfiConstant.HEADER_ACCESS_TOKEN) String accessToken,
 														@RequestPart("file") MultipartFile file,
 														@RequestPart("attachmentUploadFileArgs") String attachmentUploadFileArgs);
+
+	/**
+	 * 单据锁定（lockBusiData）：推送金蝶成功后 WLTMS 调用锁定目标单据；
+	 * 多张单据编号逗号拼接批量传参（sourceBillNo 与 targetBillNo 顺序一一对应），
+	 * 应答为 {updateCount, updateResultList} 裸结构（非 BfiResultVO 包装）；
+	 * 解锁结果由金蝶经 unLockNotifyBusiData 回调 WLTMS 通知（见 transport 侧公开端点）
+	 *
+	 * @param accessToken 访问令牌，通过 getToken 获取
+	 * @param param       锁单参数
+	 * @return 锁单处理结果
+	 */
+	@PostMapping(LOCK_BILL_URL)
+	BfiBillLockResultVO lockBusiData(@RequestHeader(BfiConstant.HEADER_ACCESS_TOKEN) String accessToken, @RequestBody BfiBillLockDTO param);
 }
diff --git a/blade-third-party-api/blade-bfi-api/src/main/java/org/springblade/thirdparty/bfi/pojo/dto/BfiBillLockDTO.java b/blade-third-party-api/blade-bfi-api/src/main/java/org/springblade/thirdparty/bfi/pojo/dto/BfiBillLockDTO.java
new file mode 100644
index 00000000..14512ef3
--- /dev/null
+++ b/blade-third-party-api/blade-bfi-api/src/main/java/org/springblade/thirdparty/bfi/pojo/dto/BfiBillLockDTO.java
@@ -0,0 +1,90 @@
+/**
+ * BladeX Commercial License Agreement
+ * Copyright (c) 2018-2099, https://bladex.cn. All rights reserved.
+ * <p>
+ * Use of this software is governed by the Commercial License Agreement
+ * obtained after purchasing a license from BladeX.
+ * <p>
+ * 1. This software is for development use only under a valid license
+ * from BladeX.
+ * <p>
+ * 2. Redistribution of this software's source code to any third party
+ * without a commercial license is strictly prohibited.
+ * <p>
+ * 3. Licensees may copyright their own code but cannot use segments
+ * of this software for such purposes. Copyright of this software
+ * remains with BladeX.
+ * <p>
+ * Using this software signifies agreement to this License, and the software
+ * must not be used for illegal purposes.
+ * <p>
+ * THIS SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY. The author is
+ * not liable for any claims arising from secondary or illegal development.
+ * <p>
+ * Author: Chill Zhuang (bladejava@qq.com)
+ */
+package org.springblade.thirdparty.bfi.pojo.dto;
+
+import com.fasterxml.jackson.annotation.JsonInclude;
+import lombok.Data;
+import lombok.EqualsAndHashCode;
+
+import java.io.Serial;
+
+/**
+ * 业财融合（BFI）单据锁定/解锁通知参数（lockBusiData 与 unLockNotifyBusiData 出入参共用）。
+ * <p>lockBusiData：WLTMS 调金蝶，sourceSystem=WLTMS、targetSystem=XH、lockAction=LOCK；
+ * unLockNotifyBusiData：金蝶调 WLTMS，sourceSystem=XH、targetSystem=WLTMS、lockAction=UNLOCK，
+ * operationType=DELETE 时 WLTMS 侧需废除源单并还原关联数据。
+ * 批量传参约定：多张单据编号以英文逗号拼接（sourceBillNo 与 targetBillNo 按顺序一一对应），
+ * time/operator 按接口文档为选传字段（示例报文未携带），非空时才送</p>
+ *
+ * @author Chill
+ */
+@Data
+@EqualsAndHashCode(callSuper = true)
+@JsonInclude(JsonInclude.Include.NON_NULL)
+public class BfiBillLockDTO extends BfiBaseDTO {
+	@Serial
+	private static final long serialVersionUID = 1L;
+	/**
+	 * 【必填】操作类型：LOCK-锁定，UNLOCK-解锁
+	 */
+	private String lockAction;
+	/**
+	 * 【必填】源系统标识，即接口调用方：WLTMS / XH
+	 */
+	private String sourceSystem;
+	/**
+	 * 【必填】目标系统标识，即接口目标接收方：WLTMS / XH
+	 */
+	private String targetSystem;
+	/**
+	 * 【必填】来源操作类型：SAVE-单据新增，DELETE-单据删除
+	 */
+	private String operationType;
+	/**
+	 * 【必填】源单据类型：调用方单据类型（WLTMS 自定义：SETTLEMENT/INVOICE_APPLY，金蝶固定：ApFin_other_BT_S 等），多张同类型
+	 */
+	private String sourceBillType;
+	/**
+	 * 【必填】源单据编号，多张英文逗号拼接
+	 */
+	private String sourceBillNo;
+	/**
+	 * 【必填】目标单据类型：接收方单据类型（金蝶固定：ApFin_other_BT_S 等，WLTMS 自定义：SETTLEMENT 等），多张同类型
+	 */
+	private String targetBillType;
+	/**
+	 * 【必填】目标单据编号，多张英文逗号拼接，与 sourceBillNo 顺序一一对应
+	 */
+	private String targetBillNo;
+	/**
+	 * 操作时间，格式：yyyy-MM-dd HH:mm:ss（非空才送）
+	 */
+	private String time;
+	/**
+	 * 操作人名字：推单用发起人，删除用操作人（非空才送）
+	 */
+	private String operator;
+}
diff --git a/blade-third-party-api/blade-bfi-api/src/main/java/org/springblade/thirdparty/bfi/pojo/vo/BfiBillLockResultVO.java b/blade-third-party-api/blade-bfi-api/src/main/java/org/springblade/thirdparty/bfi/pojo/vo/BfiBillLockResultVO.java
new file mode 100644
index 00000000..6a470ada
--- /dev/null
+++ b/blade-third-party-api/blade-bfi-api/src/main/java/org/springblade/thirdparty/bfi/pojo/vo/BfiBillLockResultVO.java
@@ -0,0 +1,78 @@
+/**
+ * BladeX Commercial License Agreement
+ * Copyright (c) 2018-2099, https://bladex.cn. All rights reserved.
+ * <p>
+ * Use of this software is governed by the Commercial License Agreement
+ * obtained after purchasing a license from BladeX.
+ * <p>
+ * 1. This software is for development use only under a valid license
+ * from BladeX.
+ * <p>
+ * 2. Redistribution of this software's source code to any third party
+ * without a commercial license is strictly prohibited.
+ * <p>
+ * 3. Licensees may copyright their own code but cannot use segments
+ * of this software for such purposes. Copyright of this software
+ * remains with BladeX.
+ * <p>
+ * Using this software signifies agreement to this License, and the software
+ * must not be used for illegal purposes.
+ * <p>
+ * THIS SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY. The author is
+ * not liable for any claims arising from secondary or illegal development.
+ * <p>
+ * Author: Chill Zhuang (bladejava@qq.com)
+ */
+package org.springblade.thirdparty.bfi.pojo.vo;
+
+import com.fasterxml.jackson.annotation.JsonInclude;
+import lombok.Data;
+
+import java.io.Serial;
+import java.io.Serializable;
+import java.util.List;
+
+/**
+ * 业财融合（BFI）单据锁定/解锁通知处理结果。
+ * <p>lockBusiData（金蝶返回）与 unLockNotifyBusiData（WLTMS 回调应答）同构：
+ * updateCount 为处理单据数，updateResultList 为逐单处理结果（1-成功，0-失败/未匹配），
+ * 批量传参时单据编号逗号拼接、结果列表与传参顺序对应</p>
+ *
+ * @author Chill
+ */
+@Data
+@JsonInclude(JsonInclude.Include.NON_NULL)
+public class BfiBillLockResultVO implements Serializable {
+	@Serial
+	private static final long serialVersionUID = 1L;
+	/**
+	 * 处理单据数量
+	 */
+	private Integer updateCount;
+	/**
+	 * 逐单处理结果：1-成功，0-失败/未匹配
+	 */
+	private List<Integer> updateResultList;
+
+	/**
+	 * 组装成功应答
+	 *
+	 * @param count 处理单据数
+	 * @return 应答结果
+	 */
+	public static BfiBillLockResultVO of(int count) {
+		BfiBillLockResultVO result = new BfiBillLockResultVO();
+		result.setUpdateCount(count);
+		result.setUpdateResultList(count > 0 ? List.of(1) : List.of(0));
+		return result;
+	}
+
+	/**
+	 * 是否全部处理成功
+	 *
+	 * @return true-更新数量大于0
+	 */
+	public boolean isSuccess() {
+		return updateCount != null && updateCount > 0;
+	}
+}
diff --git a/blade-third-party-api/blade-bfi-api/src/main/java/org/springblade/thirdparty/bfi/service/IBfiService.java b/blade-third-party-api/blade-bfi-api/src/main/java/org/springblade/thirdparty/bfi/service/IBfiService.java
index dc8e2973..43282b71 100644
--- a/blade-third-party-api/blade-bfi-api/src/main/java/org/springblade/thirdparty/bfi/service/IBfiService.java
+++ b/blade-third-party-api/blade-bfi-api/src/main/java/org/springblade/thirdparty/bfi/service/IBfiService.java
@@ -30,6 +30,7 @@ import org.springblade.thirdparty.bfi.pojo.dto.BfiApBillQueryDTO;
 import org.springblade.thirdparty.bfi.pojo.dto.BfiApBillSaveDTO;
 import org.springblade.thirdparty.bfi.pojo.dto.BfiArBillQueryDTO;
 import org.springblade.thirdparty.bfi.pojo.dto.BfiArBillSaveDTO;
+import org.springblade.thirdparty.bfi.pojo.dto.BfiBillLockDTO;
 import org.springblade.thirdparty.bfi.pojo.dto.BfiClaimAnnounceQueryDTO;
 import org.springblade.thirdparty.bfi.pojo.dto.BfiClaimPushDTO;
 import org.springblade.thirdparty.bfi.pojo.dto.BfiCustomerQueryDTO;
@@ -314,4 +315,13 @@ public interface IBfiService {
 	 * @return 上传结果，path 即金蝶侧文件路径
 	 */
 	BfiAttachmentUploadVO uploadAttachment(String entityNumber, String billPkId, String controlKey, String fileName, byte[] fileContent);
+
+	/**
+	 * 单据锁定（lockBusiData）：推送金蝶成功后锁定目标单据，多张单据编号逗号拼接批量传参，
+	 * 解锁结果由金蝶回调 unLockNotifyBusiData 通知
+	 *
+	 * @param param 锁单参数，操作类型固定 LOCK，源系统 WLTMS、目标系统 XH
+	 * @return true-锁定成功（updateCount 大于 0）
+	 */
+	boolean lockBusiData(BfiBillLockDTO param);
 }
diff --git a/blade-third-party-api/blade-bfi-api/src/main/java/org/springblade/thirdparty/bfi/service/impl/BfiServiceImpl.java b/blade-third-party-api/blade-bfi-api/src/main/java/org/springblade/thirdparty/bfi/service/impl/BfiServiceImpl.java
index d49a7852..2423b0a8 100644
--- a/blade-third-party-api/blade-bfi-api/src/main/java/org/springblade/thirdparty/bfi/service/impl/BfiServiceImpl.java
+++ b/blade-third-party-api/blade-bfi-api/src/main/java/org/springblade/thirdparty/bfi/service/impl/BfiServiceImpl.java
@@ -43,6 +43,7 @@ import org.springblade.thirdparty.bfi.pojo.dto.BfiApBillSaveDTO;
 import org.springblade.thirdparty.bfi.pojo.dto.BfiArBillQueryDTO;
 import org.springblade.thirdparty.bfi.pojo.dto.BfiArBillSaveBodyDTO;
 import org.springblade.thirdparty.bfi.pojo.dto.BfiArBillSaveDTO;
+import org.springblade.thirdparty.bfi.pojo.dto.BfiBillLockDTO;
 import org.springblade.thirdparty.bfi.pojo.dto.BfiBlacklistQueryDTO;
 import org.springblade.thirdparty.bfi.pojo.dto.BfiClaimAnnounceQueryDTO;
 import org.springblade.thirdparty.bfi.pojo.dto.BfiClaimPushBodyDTO;
@@ -77,6 +78,7 @@ import org.springblade.thirdparty.bfi.pojo.dto.BfiWithdrawTokenDTO;
 import org.springblade.thirdparty.bfi.pojo.vo.BfiApBillVO;
 import org.springblade.thirdparty.bfi.pojo.vo.BfiArBillVO;
 import org.springblade.thirdparty.bfi.pojo.vo.BfiAttachmentUploadVO;
+import org.springblade.thirdparty.bfi.pojo.vo.BfiBillLockResultVO;
 import org.springblade.thirdparty.bfi.pojo.vo.BfiBillSaveResultVO;
 import org.springblade.thirdparty.bfi.pojo.vo.BfiBlacklistVO;
 import org.springblade.thirdparty.bfi.pojo.vo.BfiClaimAnnounceVO;
@@ -370,6 +372,32 @@ public class BfiServiceImpl implements IBfiService {
 		return result.getData();
 	}
 
+	@Override
+	public boolean lockBusiData(BfiBillLockDTO param) {
+		if (param == null || StringUtil.isBlank(param.getLockAction()) || StringUtil.isBlank(param.getSourceSystem())
+			|| StringUtil.isBlank(param.getTargetSystem()) || StringUtil.isBlank(param.getOperationType())
+			|| StringUtil.isBlank(param.getSourceBillType()) || StringUtil.isBlank(param.getSourceBillNo())
+			|| StringUtil.isBlank(param.getTargetBillType()) || StringUtil.isBlank(param.getTargetBillNo())) {
+			throw new BfiException("BFI单据锁定失败，操作类型/源目标系统/操作类型/单据类型与编号不能为空");
+		}
+		// 锁单应答为 {updateCount, updateResultList} 裸结构（非 BfiResultVO 包装），独立校验
+		try {
+			String accessToken = getAccessToken();
+			BfiBillLockResultVO result = client.lockBusiData(accessToken, param);
+			if (result != null && result.isSuccess()) {
+				return true;
+			}
+			log.error("调用BFI接口单据锁定异常响应参数：{}", JSONUtil.toJsonStr(result));
+			throw new BfiException("调用BFI接口单据锁定异常 " + (result == null ? "响应为空或解析失败" : "updateCount=" + result.getUpdateCount()));
+		} catch (BfiException e) {
+			log.error("调用BFI接口单据锁定,BfiException异常", e);
+			throw e;
+		} catch (Exception e) {
+			log.error("调用BFI接口单据锁定异常", e);
+			throw new BfiException("调用BFI接口单据锁定异常", e);
+		}
+	}
+
 	@Override
 	public BfiPageVO<BfiArBillVO> queryArBill(BfiArBillQueryDTO param) {
 		if (param == null || param.getPageNo() == null || param.getPageSize() == null) {