diff --git a/src/main/java/com/nbport/zgwl/contractlaunch/service/ContractLaunchServiceImpl.java b/src/main/java/com/nbport/zgwl/contractlaunch/service/ContractLaunchServiceImpl.java
index 5bdcf4a..8ee8713 100644
--- a/src/main/java/com/nbport/zgwl/contractlaunch/service/ContractLaunchServiceImpl.java
+++ b/src/main/java/com/nbport/zgwl/contractlaunch/service/ContractLaunchServiceImpl.java
@@ -344,6 +344,9 @@ public class ContractLaunchServiceImpl implements ContractLaunchService {
     @Transactional(rollbackFor = Exception.class)
     public ContractLaunchDto handleLawApproveCallback(ContractLaunchLawCallbackDto callbackData) {
         ContractLaunchDto contract = getContractByLawCallback(callbackData);
+        if (isSingleAgreement(contract)) {
+            throw new ServiceException("单方协议不接收法务审批回调");
+        }
         SysUserEntity currentUser = adminSecurityManage.getUser();
 
         boolean approved = isLawCallbackApproved(callbackData);
@@ -394,6 +397,9 @@ public class ContractLaunchServiceImpl implements ContractLaunchService {
     @Transactional(rollbackFor = Exception.class)
     public ContractLaunchDto saveSealInfo(Long id, ContractLaunchSealDto sealDto) {
         ContractLaunchDto contract = getDetail(id);
+        if (isSingleAgreement(contract)) {
+            throw new ServiceException("单方协议无需发起在线签章");
+        }
         SysUserEntity currentUser = adminSecurityManage.getUser();
         contract.setSealContractId(sealDto.getSealContractId());
         contract.setSealContractStatus(sealDto.getSealContractStatus());
@@ -425,6 +431,7 @@ public class ContractLaunchServiceImpl implements ContractLaunchService {
         ContractLaunchDto contract = getDetail(id);
         SysUserEntity currentUser = adminSecurityManage.getUser();
         LocalDateTime completedTime = LocalDateTime.now();
+        boolean singleAgreement = isSingleAgreement(contract);
         contract.setSealContractId(sealDto.getSealContractId() == null || sealDto.getSealContractId().isBlank() ? contract.getSealContractId() : sealDto.getSealContractId());
         contract.setSealContractStatus(sealDto.getSealContractStatus());
         contract.setSignedFileName(sealDto.getSignedFileName());
@@ -439,12 +446,20 @@ public class ContractLaunchServiceImpl implements ContractLaunchService {
         contract.setSealDate(firstNonNull(sealDto.getSealDate(), contract.getSealDate(), contract.getSignDate()));
         contract.setActiveDate(firstNonNull(sealDto.getActiveDate(), contract.getActiveDate()));
         validateSignCompletion(contract);
-        contract.setStatus(ContractLaunchConstants.STATUS_PENDING_COLLECT);
+        contract.setStatus(singleAgreement ? ContractLaunchConstants.STATUS_COMPLETED : ContractLaunchConstants.STATUS_PENDING_COLLECT);
         contract.setUpdateBy(currentUser.getUsername());
         contract.setUpdateTime(completedTime);
         contractLaunchMapper.updateContract(contract);
         saveSignedFile(id, sealDto, currentUser.getUsername());
-        insertLog(id, ContractLaunchConstants.ACTION_SEAL_FINISH, "签署完成", ContractLaunchConstants.ACTION_STATUS_SUCCESS, "合同签署已完成，待采集", sealDto, currentUser);
+        insertLog(
+                id,
+                ContractLaunchConstants.ACTION_SEAL_FINISH,
+                singleAgreement ? "盖章完成" : "签署完成",
+                ContractLaunchConstants.ACTION_STATUS_SUCCESS,
+                singleAgreement ? "单方协议已盖章生效，流程完成" : "合同签署已完成，待采集",
+                sealDto,
+                currentUser
+        );
         return getDetail(id);
     }
 
@@ -471,6 +486,9 @@ public class ContractLaunchServiceImpl implements ContractLaunchService {
     @Transactional(rollbackFor = Exception.class)
     public ContractLaunchDto mockCollect(Long id) {
         ContractLaunchDto contract = getDetail(id);
+        if (isSingleAgreement(contract)) {
+            throw new ServiceException("单方协议无需执行法务采集");
+        }
         if (!ContractLaunchConstants.STATUS_PENDING_COLLECT.equals(contract.getStatus())) {
             throw new ServiceException("当前状态不允许执行采集");
         }
@@ -513,6 +531,9 @@ public class ContractLaunchServiceImpl implements ContractLaunchService {
     @Transactional(rollbackFor = Exception.class)
     public ContractLaunchDto archive(Long id, ContractLaunchArchiveDto archiveDto) {
         ContractLaunchDto contract = getDetail(id);
+        if (isSingleAgreement(contract)) {
+            throw new ServiceException("单方协议无需执行法务归档");
+        }
         if (!ContractLaunchConstants.STATUS_PENDING_ARCHIVE.equals(contract.getStatus())) {
             throw new ServiceException("当前状态不允许归档");
         }
@@ -839,11 +860,13 @@ public class ContractLaunchServiceImpl implements ContractLaunchService {
             item.setArchiveEles(archiveEles);
             item.setLogList(new ArrayList<>(logMap.getOrDefault(item.getId(), Collections.emptyList())));
             item.setCounterpartySummary(
-                    item.getPartyList().stream()
-                            .filter(this::isOppositeParty)
-                            .map(ContractLaunchPartyDto::getCompanyName)
-                            .filter(name -> name != null && !name.isBlank())
-                            .collect(Collectors.joining("；"))
+                    isSingleAgreement(item)
+                            ? "单方协议"
+                            : item.getPartyList().stream()
+                                    .filter(this::isOppositeParty)
+                                    .map(ContractLaunchPartyDto::getCompanyName)
+                                    .filter(name -> name != null && !name.isBlank())
+                                    .collect(Collectors.joining("；"))
             );
         });
     }
@@ -962,6 +985,7 @@ public class ContractLaunchServiceImpl implements ContractLaunchService {
         if (contract == null) {
             throw new ServiceException("合同数据不能为空");
         }
+        boolean singleAgreement = isSingleAgreement(contract);
         contract.setContractName(trim(contract.getContractName()));
         contract.setContractCode(trim(contract.getContractCode()));
         contract.setContractType(trim(contract.getContractType()));
@@ -999,6 +1023,12 @@ public class ContractLaunchServiceImpl implements ContractLaunchService {
         if (contract.getPushUrl() == null || contract.getPushUrl().isBlank()) {
             contract.setPushUrl("/contract/launch/callback/law/approve");
         }
+        if (singleAgreement) {
+            contract.setIsElectron("0");
+            if (contract.getSealType() == null || contract.getSealType().isBlank()) {
+                contract.setSealType("YWZ");
+            }
+        }
         if (contract.getSealQuantity() == null) {
             contract.setSealQuantity(1);
         }
@@ -1019,9 +1049,11 @@ public class ContractLaunchServiceImpl implements ContractLaunchService {
         if (contract == null || contract.getPartyList() == null) {
             return;
         }
+        boolean singleAgreement = isSingleAgreement(contract);
         List<ContractLaunchPartyDto> normalized = contract.getPartyList().stream()
                 .filter(Objects::nonNull)
                 .filter(item -> item.getCompanyName() != null && !item.getCompanyName().isBlank())
+                .filter(item -> !singleAgreement || !isOppositeParty(item))
                 .peek(item -> {
                     String roleCode = trim(item.getRoleCode());
                     if (roleCode == null || roleCode.isBlank()) {
@@ -1146,6 +1178,17 @@ public class ContractLaunchServiceImpl implements ContractLaunchService {
             if (!containsCurrentOrg) {
                 throw new ServiceException("我方主体中必须包含当前登录主体");
             }
+            if (isSingleAgreement(contract)) {
+                boolean onlyCurrentOrg = contract.getPartyList().stream()
+                        .filter(this::isOurParty)
+                        .map(ContractLaunchPartyDto::getSubjectCode)
+                        .filter(Objects::nonNull)
+                        .map(String::trim)
+                        .allMatch(currentOrgId::equals);
+                if (!onlyCurrentOrg) {
+                    throw new ServiceException("单方协议仅允许使用当前登录主体");
+                }
+            }
         }
         if (!isSingleAgreement(contract) && !hasCounterparty) {
             throw new ServiceException("至少维护一个相对方");