diff --git a/src/main/java/com/biutag/supervision/flow/action/ConfirmationCompletionAction.java b/src/main/java/com/biutag/supervision/flow/action/ConfirmationCompletionAction.java
index 39cf7aa..041e836 100644
--- a/src/main/java/com/biutag/supervision/flow/action/ConfirmationCompletionAction.java
+++ b/src/main/java/com/biutag/supervision/flow/action/ConfirmationCompletionAction.java
@@ -121,7 +121,7 @@ public class ConfirmationCompletionAction implements Action {
             // 只有超过24小时工作日才记录
             if (negative.getLatestProcessTime() != null) {
                 long newDuration = TimeUtil.calculateWorkdayDuration(negative.getLatestProcessTime(), now);
-                if (newDuration >= TimeUtil.SECONDS_OF_A_DAY) {
+                if (newDuration >= TimeUtil.getApprovalLockThreshold("branch")) {
                     updateWrapper.set(Negative::getSecondApprovalTime, newDuration);
                 }
             }
@@ -130,7 +130,7 @@ public class ConfirmationCompletionAction implements Action {
             // 只有超过24小时工作日才记录
             if (negative.getLatestProcessTime() != null) {
                 long newDuration = TimeUtil.calculateWorkdayDuration(negative.getLatestProcessTime(), now);
-                if (newDuration >= TimeUtil.SECONDS_OF_A_DAY) {
+                if (newDuration >= TimeUtil.getApprovalLockThreshold("city")) {
                     updateWrapper.set(Negative::getFirstApproveTime, newDuration);
                 }
             }
diff --git a/src/main/java/com/biutag/supervision/flow/action/FirstApproveReturnAction.java b/src/main/java/com/biutag/supervision/flow/action/FirstApproveReturnAction.java
index ce7c116..5db406d 100644
--- a/src/main/java/com/biutag/supervision/flow/action/FirstApproveReturnAction.java
+++ b/src/main/java/com/biutag/supervision/flow/action/FirstApproveReturnAction.java
@@ -51,7 +51,7 @@ public class FirstApproveReturnAction implements Action {
         // 只有超过24小时工作日才记录
         if (negative.getLatestProcessTime() != null) {
             long newDuration = TimeUtil.calculateWorkdayDuration(negative.getLatestProcessTime(), now);
-            if (newDuration >= TimeUtil.SECONDS_OF_A_DAY) {
+            if (newDuration >= TimeUtil.getApprovalLockThreshold("city")) {
                 newFirstApproveTime = newDuration;
             }
         }
diff --git a/src/main/java/com/biutag/supervision/flow/action/SecondApproveAction.java b/src/main/java/com/biutag/supervision/flow/action/SecondApproveAction.java
index b608a4a..51d8b71 100644
--- a/src/main/java/com/biutag/supervision/flow/action/SecondApproveAction.java
+++ b/src/main/java/com/biutag/supervision/flow/action/SecondApproveAction.java
@@ -60,7 +60,7 @@ public class SecondApproveAction implements Action {
         // 只有超过24小时工作日才记录
         if (negative.getLatestProcessTime() != null) {
             long newDuration = TimeUtil.calculateWorkdayDuration(negative.getLatestProcessTime(), now);
-            if (newDuration >= TimeUtil.SECONDS_OF_A_DAY) {
+            if (newDuration >= TimeUtil.getApprovalLockThreshold("branch")) {
                 updateWrapper.set(Negative::getSecondApprovalTime, newDuration);
             }
         }
diff --git a/src/main/java/com/biutag/supervision/flow/action/SecondApproveReturnAction.java b/src/main/java/com/biutag/supervision/flow/action/SecondApproveReturnAction.java
index 811aed0..f471cfb 100644
--- a/src/main/java/com/biutag/supervision/flow/action/SecondApproveReturnAction.java
+++ b/src/main/java/com/biutag/supervision/flow/action/SecondApproveReturnAction.java
@@ -52,7 +52,7 @@ public class SecondApproveReturnAction implements Action {
         // 只有超过24小时工作日才记录
         if (negative.getLatestProcessTime() != null) {
             long newDuration = TimeUtil.calculateWorkdayDuration(negative.getLatestProcessTime(), now);
-            if (newDuration >= TimeUtil.SECONDS_OF_A_DAY) {
+            if (newDuration >= TimeUtil.getApprovalLockThreshold("branch")) {
                 newSecondApprovalTime = newDuration;
             }
         }
diff --git a/src/main/java/com/biutag/supervision/service/NegativeQueryService.java b/src/main/java/com/biutag/supervision/service/NegativeQueryService.java
index ee2ecf0..b624009 100644
--- a/src/main/java/com/biutag/supervision/service/NegativeQueryService.java
+++ b/src/main/java/com/biutag/supervision/service/NegativeQueryService.java
@@ -259,18 +259,20 @@ public class NegativeQueryService {
     }
 
     private void buildTimeoutCondition(LambdaQueryWrapper<Negative> queryWrapper, String status) {
+        Long cityThreshold = TimeUtil.getApprovalLockThreshold("city");
+        Long branchThreshold = TimeUtil.getApprovalLockThreshold("branch");
         switch (status) {
             case "city_timeout":
-                queryWrapper.gt(Negative::getFirstApproveTime, TimeUtil.SECONDS_OF_A_DAY);
+                queryWrapper.gt(Negative::getFirstApproveTime, cityThreshold);
                 break;
             case "city_normal":
-                queryWrapper.le(Negative::getFirstApproveTime, TimeUtil.SECONDS_OF_A_DAY).or().isNull(Negative::getFirstApproveTime);
+                queryWrapper.le(Negative::getFirstApproveTime, cityThreshold).or().isNull(Negative::getFirstApproveTime);
                 break;
             case "branch_timeout":
-                queryWrapper.gt(Negative::getSecondApprovalTime, TimeUtil.SECONDS_OF_A_DAY);
+                queryWrapper.gt(Negative::getSecondApprovalTime, branchThreshold);
                 break;
             case "branch_normal":
-                queryWrapper.le(Negative::getSecondApprovalTime, TimeUtil.SECONDS_OF_A_DAY).or().isNull(Negative::getSecondApprovalTime);
+                queryWrapper.le(Negative::getSecondApprovalTime, branchThreshold).or().isNull(Negative::getSecondApprovalTime);
                 break;
         }
     }
diff --git a/src/main/java/com/biutag/supervision/util/TimeUtil.java b/src/main/java/com/biutag/supervision/util/TimeUtil.java
index 9c01427..e6f4a22 100644
--- a/src/main/java/com/biutag/supervision/util/TimeUtil.java
+++ b/src/main/java/com/biutag/supervision/util/TimeUtil.java
@@ -4,7 +4,9 @@ import cn.hutool.core.date.DatePattern;
 import cn.hutool.core.util.NumberUtil;
 import cn.hutool.core.util.StrUtil;
 import com.biutag.supervision.constants.enums.FlowNodeEnum;
+import com.biutag.supervision.pojo.entity.SupDictData;
 import com.biutag.supervision.service.HolidayService;
+import com.biutag.supervision.service.SupDictDataService;
 
 import java.text.SimpleDateFormat;
 import java.time.LocalDate;
@@ -51,7 +53,46 @@ public class TimeUtil {
      * @return true=可以更新，false=已锁定不可更新（>=86400秒）
      */
     public static boolean canUpdateApproveTime(Long currentDuration) {
-        return currentDuration == null || currentDuration < APPROVAL_LOCK_THRESHOLD;
+        return canUpdateApproveTime(currentDuration, null);
+    }
+
+    /**
+     * 判断审批时长是否可以更新
+     * @param currentDuration 当前审批时长（秒），null表示尚未开始计时
+     * @param dictValue 审批超时字典值，branch=分局审批，city=市局审批
+     * @return true=可以更新，false=已锁定不可更新
+     */
+    public static boolean canUpdateApproveTime(Long currentDuration, String dictValue) {
+        Long threshold = getApprovalLockThreshold(dictValue);
+        return currentDuration == null || currentDuration < threshold;
+    }
+
+    /**
+     * 读取审批超时锁定阈值（秒）
+     * @param dictValue 字典值，branch=分局审批，city=市局审批
+     * @return 阈值秒数，读取失败时按默认值返回
+     */
+    public static Long getApprovalLockThreshold(String dictValue) {
+        if (StrUtil.isBlank(dictValue)) {
+            return APPROVAL_LOCK_THRESHOLD;
+        }
+        try {
+            SupDictData dictData = SpringUtil.getBean(SupDictDataService.class)
+                    .get("approvalTimeout", dictValue);
+            if (dictData != null && StrUtil.isNotBlank(dictData.getDictValue())) {
+                long days = Long.parseLong(dictData.getDictValue());
+                return days * SECONDS_OF_A_DAY;
+            }
+        } catch (Exception e) {
+            // 字典读取失败时使用默认值，不影响流程
+        }
+        if ("city".equals(dictValue)) {
+            return 3L * SECONDS_OF_A_DAY;
+        }
+        if ("branch".equals(dictValue)) {
+            return 2L * SECONDS_OF_A_DAY;
+        }
+        return APPROVAL_LOCK_THRESHOLD;
     }
 
     /**