diff --git a/jeecg-module-supervision/src/main/java/org/jeecg/modules/improvementproposal/controller/ImprovementProposalController.java b/jeecg-module-supervision/src/main/java/org/jeecg/modules/improvementproposal/controller/ImprovementProposalController.java
index 0a4c040..09f7dbd 100644
--- a/jeecg-module-supervision/src/main/java/org/jeecg/modules/improvementproposal/controller/ImprovementProposalController.java
+++ b/jeecg-module-supervision/src/main/java/org/jeecg/modules/improvementproposal/controller/ImprovementProposalController.java
@@ -105,11 +105,12 @@ public class ImprovementProposalController {
 		ImprovementProposal improvementProposal = new ImprovementProposal();
 		BeanUtils.copyProperties(improvementProposalPage, improvementProposal);
         improvementProposal.setBpmStatus("1");
-		// 新增申请阶段只创建主表，评分和投票子表由后续流程节点维护。
-		improvementProposalService.saveMain(improvementProposal, null, null);
-		// 附件需要使用主表 ID 关联，不能让前端从成功提示文本中猜测新增记录的 ID。
-		Map<String, String> result = new HashMap<>(1);
+		// 新增申请在保存事务内分配年度流水号，避免前端预取号产生并发重复。
+		improvementProposalService.createNewProposal(improvementProposal);
+		// 附件必须使用已落库的主表 ID 关联，不能使用响应成功文案。
+		Map<String, String> result = new HashMap<>(2);
 		result.put("id", improvementProposal.getId());
+		result.put("proposalNo", improvementProposal.getProposalNo());
 		return Result.OK("添加成功！", result);
 	}
 	
diff --git a/jeecg-module-supervision/src/main/java/org/jeecg/modules/improvementproposal/mapper/ImprovementProposalMapper.java b/jeecg-module-supervision/src/main/java/org/jeecg/modules/improvementproposal/mapper/ImprovementProposalMapper.java
index 6a633c9..8206aeb 100644
--- a/jeecg-module-supervision/src/main/java/org/jeecg/modules/improvementproposal/mapper/ImprovementProposalMapper.java
+++ b/jeecg-module-supervision/src/main/java/org/jeecg/modules/improvementproposal/mapper/ImprovementProposalMapper.java
@@ -16,6 +16,13 @@ import java.util.List;
 public interface ImprovementProposalMapper extends BaseMapper<ImprovementProposal> {
 
     String selectLatestProposalNoByYear(@Param("year") Integer year);
+
+	/** 原子递增指定年度的提案流水号，首次使用该年度时从 1 开始。 */
+	int incrementProposalYearSequence(@Param("year") Integer year);
+
+	/** 在当前事务内锁定并读取指定年度的最新提案流水号。 */
+	Integer selectProposalYearSequenceForUpdate(@Param("year") Integer year);
+
 	/**
 	 * 锁定提案主表，串行化流程发起、编辑和删除操作，避免同一提案生成多个流程实例。
 	 */
diff --git a/jeecg-module-supervision/src/main/java/org/jeecg/modules/improvementproposal/mapper/xml/ImprovementProposalMapper.xml b/jeecg-module-supervision/src/main/java/org/jeecg/modules/improvementproposal/mapper/xml/ImprovementProposalMapper.xml
index 1b7e498..985aacc 100644
--- a/jeecg-module-supervision/src/main/java/org/jeecg/modules/improvementproposal/mapper/xml/ImprovementProposalMapper.xml
+++ b/jeecg-module-supervision/src/main/java/org/jeecg/modules/improvementproposal/mapper/xml/ImprovementProposalMapper.xml
@@ -10,6 +10,20 @@
         LIMIT 1
     </select>
 
+    <!-- INSERT ... ON DUPLICATE KEY UPDATE 以年度主键为粒度串行递增流水号。 -->
+    <update id="incrementProposalYearSequence">
+        INSERT INTO improvement_proposal_year_sequence (sequence_year, current_sequence)
+        VALUES (#{year}, 1)
+        ON DUPLICATE KEY UPDATE current_sequence = current_sequence + 1
+    </update>
+
+    <select id="selectProposalYearSequenceForUpdate" resultType="java.lang.Integer">
+        SELECT current_sequence
+        FROM improvement_proposal_year_sequence
+        WHERE sequence_year = #{year}
+        FOR UPDATE
+    </select>
+
     <!-- 角色名单由服务端查询，前端只能从该受控集合中选择。 -->
     <select id="selectInstituteVoteCandidates" resultType="org.jeecg.modules.improvementproposal.dto.ImprovementInstituteVoteCandidateDTO">
         SELECT DISTINCT u.id, u.username, u.realname
diff --git a/jeecg-module-supervision/src/main/java/org/jeecg/modules/improvementproposal/service/IImprovementProposalService.java b/jeecg-module-supervision/src/main/java/org/jeecg/modules/improvementproposal/service/IImprovementProposalService.java
index b02b44c..8693808 100644
--- a/jeecg-module-supervision/src/main/java/org/jeecg/modules/improvementproposal/service/IImprovementProposalService.java
+++ b/jeecg-module-supervision/src/main/java/org/jeecg/modules/improvementproposal/service/IImprovementProposalService.java
@@ -38,6 +38,13 @@ public interface IImprovementProposalService extends IService<ImprovementProposa
 	 * @param improvementInstituteVoteList
 	 */
 	public void saveMain(ImprovementProposal improvementProposal,List<ImprovementDeptScore> improvementDeptScoreList,List<ImprovementInstituteVote> improvementInstituteVoteList) ;
+
+	/**
+	 * 创建新的改善提案，并在保存事务内生成不可重复的年度提案编号。
+	 *
+	 * @param improvementProposal 提案主表数据
+	 */
+	void createNewProposal(ImprovementProposal improvementProposal);
 	
 	/**
 	 * 修改一对多
diff --git a/jeecg-module-supervision/src/main/java/org/jeecg/modules/improvementproposal/service/impl/ImprovementProposalServiceImpl.java b/jeecg-module-supervision/src/main/java/org/jeecg/modules/improvementproposal/service/impl/ImprovementProposalServiceImpl.java
index dadc51b..d8c409f 100644
--- a/jeecg-module-supervision/src/main/java/org/jeecg/modules/improvementproposal/service/impl/ImprovementProposalServiceImpl.java
+++ b/jeecg-module-supervision/src/main/java/org/jeecg/modules/improvementproposal/service/impl/ImprovementProposalServiceImpl.java
@@ -25,6 +25,7 @@ import java.math.RoundingMode;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Collection;
+import java.util.Calendar;
 import java.util.Date;
 import java.util.Map;
 import org.flowable.engine.RuntimeService;
@@ -64,6 +65,7 @@ public class ImprovementProposalServiceImpl extends ServiceImpl<ImprovementPropo
 	private static final String AWARD_SILVER = "1";
 	private static final String AWARD_BRONZE = "2";
 	private static final String AWARD_PARTICIPATION = "3";
+	private static final int PROPOSAL_NO_SEQUENCE_LENGTH = 4;
 	private static final String INSTITUTE_VOTE_RESULT_PASSED = "通过";
 	private static final String INSTITUTE_VOTE_RESULT_FAILED = "不通过";
 
@@ -122,6 +124,35 @@ public class ImprovementProposalServiceImpl extends ServiceImpl<ImprovementPropo
 		}
 	}
 	
+	@Override
+	@Transactional(rollbackFor = Exception.class)
+	public void createNewProposal(ImprovementProposal improvementProposal) {
+		if (oConvertUtils.isEmpty(improvementProposal.getProposalDeptName())) {
+			throw new IllegalStateException("提案部门不能为空，无法生成提案编号");
+		}
+
+		int proposalYear = getProposalYear(improvementProposal.getProposalDate());
+		// 年度控制表通过主键锁串行递增，整个创建事务回滚时流水号也会随之回滚。
+		improvementProposalMapper.incrementProposalYearSequence(proposalYear);
+		Integer sequence = improvementProposalMapper.selectProposalYearSequenceForUpdate(proposalYear);
+		if (sequence == null) {
+			throw new IllegalStateException("生成提案编号失败，请稍后重试");
+		}
+
+		improvementProposal.setProposalNo(formatProposalNo(improvementProposal.getProposalDeptName(), proposalYear, sequence));
+		saveMain(improvementProposal, null, null);
+	}
+
+	private int getProposalYear(Date proposalDate) {
+		Calendar calendar = Calendar.getInstance();
+		calendar.setTime(proposalDate == null ? new Date() : proposalDate);
+		return calendar.get(Calendar.YEAR);
+	}
+
+	private String formatProposalNo(String proposalDeptName, int proposalYear, int sequence) {
+		return String.format("%s-%d年-%0" + PROPOSAL_NO_SEQUENCE_LENGTH + "d", proposalDeptName.trim(), proposalYear, sequence);
+	}
+
 	@Override
 	@Transactional(rollbackFor = Exception.class)
 	public void saveMain(ImprovementProposal improvementProposal, List<ImprovementDeptScore> improvementDeptScoreList,List<ImprovementInstituteVote> improvementInstituteVoteList) {