diff --git a/backend/src/main/java/com/designhub/service/TaskItemService.java b/backend/src/main/java/com/designhub/service/TaskItemService.java
index 008c877..31944ac 100644
--- a/backend/src/main/java/com/designhub/service/TaskItemService.java
+++ b/backend/src/main/java/com/designhub/service/TaskItemService.java
@@ -328,9 +328,70 @@ public class TaskItemService {
             }
         }
 
+        List<Long> allowedDeptIds = resolveAllowedQueueDeptIds(item);
+        if (!allowedDeptIds.isEmpty()) {
+            if (viewerDeptId != null) {
+                Long matchedDeptId = null;
+                int bestDistance = Integer.MAX_VALUE;
+                for (Long candidateDeptId : allowedDeptIds) {
+                    if (candidateDeptId == null || !isDeptMatchedOrInherited(viewerDeptId, candidateDeptId)) {
+                        continue;
+                    }
+                    int distance = getDeptDistance(viewerDeptId, candidateDeptId);
+                    if (distance < bestDistance) {
+                        bestDistance = distance;
+                        matchedDeptId = candidateDeptId;
+                    }
+                }
+                if (matchedDeptId != null) {
+                    return matchedDeptId;
+                }
+            }
+            return allowedDeptIds.get(0);
+        }
+
         return unlockStatuses.get(0).getDeptId();
     }
 
+    private List<Long> resolveAllowedQueueDeptIds(TaskItem item) {
+        if (item == null || item.getTaskTypeId() == null) {
+            return java.util.Collections.emptyList();
+        }
+
+        com.designhub.entity.DemandType demandType = configService.getDemandTypeById(item.getTaskTypeId());
+        String allowedDeptIds = null;
+        if (demandType != null) {
+            allowedDeptIds = demandType.getAllowedDeptIds();
+            if ((allowedDeptIds == null || allowedDeptIds.isBlank()) && demandType.getParentId() != null) {
+                com.designhub.entity.DemandType parentType = configService.getDemandTypeById(demandType.getParentId());
+                if (parentType != null) {
+                    allowedDeptIds = parentType.getAllowedDeptIds();
+                }
+            }
+        }
+
+        if (allowedDeptIds == null || allowedDeptIds.isBlank()) {
+            return java.util.Collections.emptyList();
+        }
+
+        List<Long> result = new java.util.ArrayList<>();
+        Set<Long> seen = new java.util.HashSet<>();
+        for (String deptIdText : allowedDeptIds.split(",")) {
+            if (deptIdText == null || deptIdText.isBlank()) {
+                continue;
+            }
+            try {
+                Long deptId = Long.parseLong(deptIdText.trim());
+                if (seen.add(deptId)) {
+                    result.add(deptId);
+                }
+            } catch (NumberFormatException e) {
+                log.warn("解析排队部门ID失败: taskItemId={}, deptIdText={}", item.getId(), deptIdText);
+            }
+        }
+        return result;
+    }
+
     private int getDeptDistance(Long userDeptId, Long targetDeptId) {
         if (userDeptId == null || targetDeptId == null) {
             return Integer.MAX_VALUE;
diff --git a/backend/src/main/java/com/designhub/service/TaskUnlockService.java b/backend/src/main/java/com/designhub/service/TaskUnlockService.java
index 89120ca..3ff736c 100644
--- a/backend/src/main/java/com/designhub/service/TaskUnlockService.java
+++ b/backend/src/main/java/com/designhub/service/TaskUnlockService.java
@@ -550,8 +550,8 @@ public class TaskUnlockService {
         
         if (isUnlocked == null) {
             // 没有记录：补全排队记录，避免“新任务绕过排队”
-            LocalDate publishDate = item.getCreateTime() != null ? item.getCreateTime().toLocalDate() : LocalDate.now();
-            unlockStatusMapper.insertIfNotExists(item.getId(), deptId, publishDate, 0);
+            ensureUnlockStatusExists(taskItemId(item), deptId);
+            tryTopUpDeptQueue(deptId);
             isUnlocked = unlockStatusMapper.isUnlocked(item.getId(), deptId);
 
             // 兜底：依然查不到则按排队中处理
@@ -624,9 +624,11 @@ public class TaskUnlockService {
         Integer isUnlocked = unlockStatusMapper.isUnlocked(taskItemId, deptId);
         
         if (isUnlocked == null) {
-            // 没有记录：补全排队记录，默认排队中（不可抢）
+            // 没有记录：补全排队记录，并尝试按部门阈值补位
             ensureUnlockStatusExists(taskItemId, deptId);
-            return false;
+            tryTopUpDeptQueue(deptId);
+            isUnlocked = unlockStatusMapper.isUnlocked(taskItemId, deptId);
+            return isUnlocked != null && isUnlocked == 1;
         }
 
         return isUnlocked == 1;
@@ -666,6 +668,21 @@ public class TaskUnlockService {
         }
     }
 
+    private void tryTopUpDeptQueue(Long deptId) {
+        if (deptId == null || !isUnlockEnabled()) {
+            return;
+        }
+        try {
+            unlockTasksForDept(deptId, getDailyUnlockMin());
+        } catch (Exception e) {
+            log.warn("补齐部门可接任务失败: deptId={}, error={}", deptId, e.getMessage());
+        }
+    }
+
+    private Long taskItemId(TaskItem item) {
+        return item == null ? null : item.getId();
+    }
+
     /**
      * 获取任务的目标接单部门ID列表（支持多部门 & 三级分类继承）
      */