diff --git a/src/utils/flowExecution.js b/src/utils/flowExecution.js
index 44be2b6..5f06015 100644
--- a/src/utils/flowExecution.js
+++ b/src/utils/flowExecution.js
@@ -59,14 +59,50 @@ export const loadFlowItemRuntimeRoles = async (items = []) => {
   return mergeResourceRoleDefinitions(roleGroups)
 }
 
+/**
+ * Loads runtime roles without merging equal role keys across flow items.
+ * Task orchestration needs one independent assignment per detection item because
+ * two items may use different physical robots even when their workflows define
+ * the same logical role (for example, `default_robot`).
+ */
+export const loadFlowItemScopedRuntimeRoles = async (items = []) => {
+  if (items.some((item) => !item?.itemId)) throw new Error('任务编排中存在缺少流程项ID的数据')
+  if (!items.length) throw new Error('当前任务没有编排任何流程项')
+
+  const occurrences = new Map()
+  const roleGroups = await Promise.all(items.map(async (item) => {
+    const occurrence = (occurrences.get(String(item.itemId)) || 0) + 1
+    occurrences.set(String(item.itemId), occurrence)
+    const response = await getDetect(item.itemId)
+    const graph = parseFlowData(item.itemName || item.itemId, response.data?.flowData)
+    return getResourceRoles(graph).map((role) => ({
+      ...clone([role])[0],
+      roleKey: `${item.itemId}:${occurrence}:${role.roleKey}`,
+      sourceRoleKey: role.roleKey,
+      itemId: item.itemId,
+      itemName: item.itemName || String(item.itemId),
+      displayName: `${item.itemName || item.itemId} / ${role.displayName}`,
+    }))
+  }))
+  return roleGroups.flat()
+}
+
 export const loadTaskRuntimeRoles = async (taskId) => {
   if (!taskId) throw new Error('任务没有关联流程编排')
   const response = await getFlowParamsApi(taskId)
   return loadFlowItemRuntimeRoles(response.rows || [])
 }
 
+export const loadTaskScopedRuntimeRoles = async (taskId) => {
+  if (!taskId) throw new Error('任务没有关联流程编排')
+  const response = await getFlowParamsApi(taskId)
+  return loadFlowItemScopedRuntimeRoles(response.rows || [])
+}
+
 export const createRuntimeAssignments = (roles = [], primaryRobotId = '') => roles.map((role, index) => ({
   roleKey: role.roleKey,
+  ...(role.sourceRoleKey ? { sourceRoleKey: role.sourceRoleKey } : {}),
+  ...(role.itemId != null ? { itemId: role.itemId } : {}),
   members: [{
     memberKey: `${role.roleKey}_1`,
     robotId: index === 0 ? primaryRobotId || role.legacyRobotId || '' : role.legacyRobotId || '',
diff --git a/src/views/flow/components/RuntimeAssignmentsEditor.vue b/src/views/flow/components/RuntimeAssignmentsEditor.vue
index 3abd07e..0876c1d 100644
--- a/src/views/flow/components/RuntimeAssignmentsEditor.vue
+++ b/src/views/flow/components/RuntimeAssignmentsEditor.vue
@@ -154,6 +154,8 @@ const initialize = async () => {
     const existingMember = existingAssignment?.members?.[0]
     return {
       roleKey: role.roleKey,
+      ...(role.sourceRoleKey ? { sourceRoleKey: role.sourceRoleKey } : {}),
+      ...(role.itemId != null ? { itemId: role.itemId } : {}),
       members: [{
         ...existingMember,
         memberKey: `${role.roleKey}_1`,
diff --git a/src/views/inspection/runTask/index.vue b/src/views/inspection/runTask/index.vue
index 61651ea..e90506c 100644
--- a/src/views/inspection/runTask/index.vue
+++ b/src/views/inspection/runTask/index.vue
@@ -140,12 +140,14 @@
         </el-dialog>
 
         <el-dialog title="本次执行安排" v-model="startDialogVisible" width="560px" append-to-body>
-            <RuntimeAssignmentsEditor
-                ref="runtimeEditorRef"
-                v-model="runtimeAssignments"
-                :roles="runtimeRoles"
-                :required-map-id="runtimeMapId"
-            />
+            <div class="start-dialog-content">
+                <RuntimeAssignmentsEditor
+                    ref="runtimeEditorRef"
+                    v-model="runtimeAssignments"
+                    :roles="runtimeRoles"
+                    :required-map-id="runtimeMapId"
+                />
+            </div>
             <template #footer>
                 <el-button @click="startDialogVisible = false">取消</el-button>
                 <el-button type="primary" :loading="startSubmitting" @click="confirmStartTask">开始执行</el-button>
@@ -168,7 +170,7 @@ import RuntimeAssignmentsEditor from '@/views/flow/components/RuntimeAssignments
 import {
     createRuntimeAssignments,
     firstAssignedRobotId,
-    loadTaskRuntimeRoles,
+    loadTaskScopedRuntimeRoles,
 } from '@/utils/flowExecution'
 
 const topContainerRef = ref();
@@ -328,7 +330,7 @@ const startTask = async (task) => {
             return
         }
         try {
-            const roles = await loadTaskRuntimeRoles(taskDefinition.taskConfigId)
+            const roles = await loadTaskScopedRuntimeRoles(taskDefinition.taskConfigId)
             runtimeAssignments.value = createRuntimeAssignments(roles, task.robotIdentity)
             runtimeMapId.value = taskDefinition.mapId || ''
             runtimeRoles.value = roles
@@ -653,4 +655,10 @@ onUnmounted(() => {
         }
     }
 }
+
+.start-dialog-content {
+    max-height: 65vh;
+    padding-right: 6px;
+    overflow-y: auto;
+}
 </style>
diff --git a/src/views/intelligenceTest/runningTask/index.vue b/src/views/intelligenceTest/runningTask/index.vue
index c96ef3e..79489a1 100644
--- a/src/views/intelligenceTest/runningTask/index.vue
+++ b/src/views/intelligenceTest/runningTask/index.vue
@@ -152,8 +152,10 @@
         </el-dialog>
 
         <el-dialog title="本次执行安排" v-model="startDialogVisible" width="560px" append-to-body>
-            <div class="start-dialog-tip">手机和车辆沿用任务配置，这里只安排执行流程的机器人和设备。</div>
-            <RuntimeAssignmentsEditor ref="runtimeEditorRef" v-model="runtimeAssignments" :roles="runtimeRoles" />
+            <div class="start-dialog-content">
+                <div class="start-dialog-tip">手机和车辆沿用任务配置，这里只安排执行流程的机器人和设备。</div>
+                <RuntimeAssignmentsEditor ref="runtimeEditorRef" v-model="runtimeAssignments" :roles="runtimeRoles" />
+            </div>
             <template #footer>
                 <el-button @click="startDialogVisible = false">取消</el-button>
                 <el-button type="primary" :loading="startSubmitting" @click="confirmStartTask">开始执行</el-button>
@@ -187,7 +189,7 @@ import RuntimeAssignmentsEditor from '@/views/flow/components/RuntimeAssignments
 import {
     createRuntimeAssignments,
     firstAssignedRobotId,
-    loadTaskRuntimeRoles,
+    loadTaskScopedRuntimeRoles,
 } from '@/utils/flowExecution'
 
 const topContainerRef = ref();
@@ -370,7 +372,7 @@ const startTask = async (task) => {
             return
         }
         try {
-            const roles = await loadTaskRuntimeRoles(taskDefinition.taskConfigId)
+            const roles = await loadTaskScopedRuntimeRoles(taskDefinition.taskConfigId)
             runtimeAssignments.value = createRuntimeAssignments(roles)
             runtimeRoles.value = roles
             pendingStartTask.value = task
@@ -706,4 +708,10 @@ onUnmounted(() => {
     color: var(--el-text-color-secondary);
     font-size: 13px;
 }
+
+.start-dialog-content {
+    max-height: 65vh;
+    padding-right: 6px;
+    overflow-y: auto;
+}
 </style>
diff --git a/src/views/test/configs/Run.vue b/src/views/test/configs/Run.vue
index 209af69..1ac79c6 100644
--- a/src/views/test/configs/Run.vue
+++ b/src/views/test/configs/Run.vue
@@ -71,7 +71,7 @@ import { taskExecute } from "@/api/test/config"
 import RuntimeAssignmentsEditor from '@/views/flow/components/RuntimeAssignmentsEditor.vue'
 import {
   firstAssignedRobotId,
-  loadFlowItemRuntimeRoles,
+  loadFlowItemScopedRuntimeRoles,
 } from '@/utils/flowExecution'
 
 const props = defineProps({
@@ -104,7 +104,7 @@ const getFlowParams = async () => {
     const data = parseConfig(res.rows)
     formData.value.tableData = data
     runtimeAssignments.value = []
-    roles.value = await loadFlowItemRuntimeRoles(data)
+    roles.value = await loadFlowItemScopedRuntimeRoles(data)
   }
 };