diff --git a/src/views/gh/improvementProposal/ImprovementProposal.api.ts b/src/views/gh/improvementProposal/ImprovementProposal.api.ts
index ec5401f..2b355c5 100644
--- a/src/views/gh/improvementProposal/ImprovementProposal.api.ts
+++ b/src/views/gh/improvementProposal/ImprovementProposal.api.ts
@@ -21,6 +21,8 @@ enum Api {
   bpmDeptScore = '/improvementproposal/improvementProposal/bpm/deptScore',
   bpmSubmitDeptScore = '/improvementproposal/improvementProposal/bpm/submitDeptScore',
   bpmLeaderAward = '/improvementproposal/improvementProposal/bpm/leaderAward',
+  bpmInstituteVoteCandidates = '/improvementproposal/improvementProposal/bpm/instituteVoteCandidates',
+  bpmInstituteVoteMembers = '/improvementproposal/improvementProposal/bpm/instituteVoteMembers',
   bpmArchiveAward = '/improvementproposal/improvementProposal/bpm/archiveAward',
   bpmInstituteVote = '/improvementproposal/improvementProposal/bpm/instituteVote',
 }
@@ -109,5 +111,7 @@ export const queryMyDeptScore = (params) => defHttp.get({ url: Api.bpmMyDeptScor
 export const saveDeptScore = (params) => defHttp.post({ url: Api.bpmDeptScore, params });
 export const submitDeptScore = (params) => defHttp.post({ url: Api.bpmSubmitDeptScore, params });
 export const saveLeaderAward = (params) => defHttp.post({ url: Api.bpmLeaderAward, params });
+export const queryInstituteVoteCandidates = (params) => defHttp.get({ url: Api.bpmInstituteVoteCandidates, params });
+export const saveInstituteVoteMembers = (params) => defHttp.post({ url: Api.bpmInstituteVoteMembers, params });
 export const saveArchiveAward = (params) => defHttp.post({ url: Api.bpmArchiveAward, params });
 export const castInstituteVote = (params) => defHttp.post({ url: Api.bpmInstituteVote, params });
diff --git a/src/views/gh/improvementProposal/components/ImprovementProposalBPMForm.vue b/src/views/gh/improvementProposal/components/ImprovementProposalBPMForm.vue
index e546079..fd7c67e 100644
--- a/src/views/gh/improvementProposal/components/ImprovementProposalBPMForm.vue
+++ b/src/views/gh/improvementProposal/components/ImprovementProposalBPMForm.vue
@@ -72,9 +72,16 @@
           </template>
 
           <template v-if="isTask('Task_improve004')">
-            <a-form-item label="所级评议人员">
-              <a-table row-key="id" size="small" bordered :columns="voteMemberColumns" :data-source="voteRows" :pagination="false" />
-              <div class="form-help">所级评议人员选择和投票记录初始化将在后续功能中接入。</div>
+            <a-form-item label="负责人确认奖项">{{ awardLabel(proposal.leaderFinalAward) }}</a-form-item>
+            <a-form-item label="所级评议人员" required>
+              <a-checkbox-group v-model:value="selectedInstituteVoterIds" class="vote-member-grid">
+                <a-checkbox v-for="member in instituteVoteCandidates" :key="member.id" :value="member.id" class="vote-member-option">
+                  <span class="vote-member-name">{{ member.realname || member.username }}</span>
+                  <span class="vote-member-username">{{ member.username }}</span>
+                </a-checkbox>
+              </a-checkbox-group>
+              <div v-if="!instituteVoteCandidates.length" class="form-help">未查询到所级评议小组人员。</div>
+              <div v-else class="form-help">请选择本次所级评议投票人员，提交办理后将生成对应投票待办。</div>
             </a-form-item>
           </template>
 
@@ -173,11 +180,13 @@
   import {
     castInstituteVote,
     queryDataById,
+    queryInstituteVoteCandidates,
     queryImprovementInstituteVoteListByMainId,
     queryMyDeptScore,
     saveArchiveAward,
     saveDeptScore,
     saveInitialReview,
+    saveInstituteVoteMembers,
     saveLeaderAward,
     submitDeptScore,
   } from '../ImprovementProposal.api';
@@ -197,6 +206,8 @@
   const proposal = ref<Recordable>({});
   const currentScore = ref<Recordable | null>(null);
   const voteRows = ref<Recordable[]>([]);
+  const instituteVoteCandidates = ref<Recordable[]>([]);
+  const selectedInstituteVoterIds = ref<string[]>([]);
   const initialAward = ref('');
   const leaderFinalAward = ref('');
   const finalAward = ref('');
@@ -210,11 +221,6 @@
     { value: '2', label: '铜奖' },
     { value: '3', label: '参与奖' },
   ];
-  const voteMemberColumns = [
-    { title: '评委', dataIndex: 'voterName', width: 180 },
-    { title: '状态', dataIndex: 'voteStatus', width: 120 },
-  ];
-
   // 流程引擎在运行待办中提供 taskDefKey，节点功能只依赖该稳定标识而非表单 URL 参数。
   const processInfo = computed(() => ({
     mainId: props.formData?.processDataId || props.formData?.dataId,
@@ -263,6 +269,8 @@
       proposal.value = {};
       currentScore.value = null;
       voteRows.value = [];
+      instituteVoteCandidates.value = [];
+      selectedInstituteVoterIds.value = [];
       return;
     }
     loading.value = true;
@@ -280,6 +288,17 @@
       initialAward.value = proposal.value.initialAward || '';
       leaderFinalAward.value = proposal.value.leaderFinalAward || '';
       finalAward.value = proposal.value.finalAward || '';
+      if (isTask('Task_improve004') && processInfo.value.processInstanceId && processInfo.value.taskId) {
+        instituteVoteCandidates.value = await queryInstituteVoteCandidates(processInfo.value);
+        const candidateIds = new Set(instituteVoteCandidates.value.map((item) => String(item.id)));
+        // 流程提交失败后重新打开 Task4 时，回显本次尚未流转的有效名单。
+        selectedInstituteVoterIds.value = voteRows.value
+          .map((item) => String(item.voterId))
+          .filter((voterId) => candidateIds.has(voterId));
+      } else {
+        instituteVoteCandidates.value = [];
+        selectedInstituteVoterIds.value = [];
+      }
     } catch (error) {
       createMessage.warning('提案数据加载失败');
     } finally {
@@ -323,6 +342,13 @@
         }
         await saveLeaderAward(actionPayload({ leaderFinalAward: leaderFinalAward.value }));
       }
+      if (isTask('Task_improve004')) {
+        if (!selectedInstituteVoterIds.value.length) {
+          createMessage.warning('请至少选择一名所级评议人员');
+          return false;
+        }
+        await saveInstituteVoteMembers(actionPayload({ voterIds: selectedInstituteVoterIds.value }));
+      }
       if (isTask('Task_improve005') && currentVote.value?.voteStatus !== 'voted') {
         createMessage.warning('请先完成投票');
         return false;
@@ -477,6 +503,36 @@
     margin-bottom: 16px;
   }
 
+  .vote-member-grid {
+    display: grid;
+    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
+    gap: 10px 12px;
+    width: 100%;
+  }
+
+  .vote-member-option {
+    display: flex;
+    align-items: center;
+    min-height: 42px;
+    margin-inline-start: 0;
+    padding: 8px 10px;
+    border: 1px solid #d9e2ec;
+    border-radius: 4px;
+    background: #fff;
+  }
+
+  .vote-member-name {
+    margin-left: 6px;
+    color: #1f2937;
+    font-weight: 500;
+  }
+
+  .vote-member-username {
+    margin-left: 6px;
+    color: #64748b;
+    font-size: 12px;
+  }
+
   @media (max-width: 768px) {
     .attachment-grid {
       grid-template-columns: 1fr;