diff --git a/blade-service/blade-transport/src/main/java/org/springblade/transport/service/impl/ProjectApplyServiceImpl.java b/blade-service/blade-transport/src/main/java/org/springblade/transport/service/impl/ProjectApplyServiceImpl.java
index 64526a01..66e154f2 100644
--- a/blade-service/blade-transport/src/main/java/org/springblade/transport/service/impl/ProjectApplyServiceImpl.java
+++ b/blade-service/blade-transport/src/main/java/org/springblade/transport/service/impl/ProjectApplyServiceImpl.java
@@ -260,6 +260,7 @@ public class ProjectApplyServiceImpl extends BaseServiceImpl<ProjectApplyMapper,
 		// 变更草稿仅更新业务字段，不生成变更记录；变更记录在 submitChange 时落库
 		ProjectApply oldRecord = loadChangeable(projectApply.getId());
 		prepare(projectApply);
+		normalizeUndertakeDept(projectApply);
 		copyChangeFields(oldRecord, projectApply);
 		validateSubmit(oldRecord);
 		validateChangeLength(oldRecord);
@@ -272,6 +273,7 @@ public class ProjectApplyServiceImpl extends BaseServiceImpl<ProjectApplyMapper,
 		ProjectApply oldRecord = loadChangeable(projectApply.getId());
 		Map<String, Object> beforeData = buildProjectChangeSnapshot(oldRecord);
 		prepare(projectApply);
+		normalizeUndertakeDept(projectApply);
 		copyChangeFields(oldRecord, projectApply);
 		validateSubmit(oldRecord);
 		validateChange(oldRecord, projectApply.getChangeType());
@@ -559,6 +561,11 @@ public class ProjectApplyServiceImpl extends BaseServiceImpl<ProjectApplyMapper,
 	}
 
 	private void copyChangeFields(ProjectApply target, ProjectApply source) {
+		// 项目变更允许调整业务部门、平台公司
+		target.setBusinessDeptId(source.getBusinessDeptId());
+		target.setBusinessDeptName(source.getBusinessDeptName());
+		target.setUndertakeDeptId(source.getUndertakeDeptId());
+		target.setUndertakeDeptName(source.getUndertakeDeptName());
 		target.setFundLimit(source.getFundLimit());
 		target.setReceivableLimit(source.getReceivableLimit());
 		target.setReceivableDays(source.getReceivableDays());