diff --git a/server/app/adminapi/logic/stats/AutoAssignLogLogic.php b/server/app/adminapi/logic/stats/AutoAssignLogLogic.php
new file mode 100644
index 00000000..12c953af
--- /dev/null
+++ b/server/app/adminapi/logic/stats/AutoAssignLogLogic.php
@@ -0,0 +1,227 @@
+<?php
+
+declare(strict_types=1);
+
+namespace app\adminapi\logic\stats;
+
+use app\common\logic\BaseLogic;
+use think\facade\Db;
+use think\facade\Log;
+
+/**
+ * 待分配诊单自动指派日志：回退已自动分配的医助
+ */
+class AutoAssignLogLogic extends BaseLogic
+{
+    /**
+     * 批量回退：将诊单医助撤回到自动分配前的原医助（指派日志 from_assistant_id），并标记自动分配日志已回退。
+     *
+     * @param list<int|string> $ids 自动分配日志 id
+     * @return array{success:int,failed:int,messages:list<string>}|false
+     */
+    public static function rollback(array $ids, int $adminId, array $adminInfo = []): array|false
+    {
+        $idList = array_values(array_unique(array_filter(array_map('intval', $ids), static fn (int $id) => $id > 0)));
+        if ($idList === []) {
+            self::setError('请选择要回退的记录');
+
+            return false;
+        }
+
+        $adminName = (string) ($adminInfo['name'] ?? '');
+        $adminAccount = (string) ($adminInfo['account'] ?? '');
+        $req = request();
+        $ip = (string) ($req->ip() ?? '');
+        $now = time();
+
+        $success = 0;
+        $failed = 0;
+        $messages = [];
+
+        foreach ($idList as $logId) {
+            try {
+                $ret = self::rollbackOne($logId, $adminId, $adminName, $adminAccount, $ip, $now);
+                if ($ret === true) {
+                    $success++;
+                } else {
+                    $failed++;
+                    $messages[] = (string) $ret;
+                }
+            } catch (\Throwable $e) {
+                $failed++;
+                $messages[] = sprintf('日志#%d：%s', $logId, $e->getMessage());
+                Log::warning('auto assign rollback failed: ' . $e->getMessage(), ['log_id' => $logId]);
+            }
+        }
+
+        if ($success === 0 && $failed > 0) {
+            self::setError($messages[0] ?? '回退失败');
+
+            return false;
+        }
+
+        return [
+            'success' => $success,
+            'failed' => $failed,
+            'messages' => $messages,
+        ];
+    }
+
+    /**
+     * @return true|string true=成功，string=失败原因
+     */
+    private static function rollbackOne(
+        int $logId,
+        int $adminId,
+        string $adminName,
+        string $adminAccount,
+        string $ip,
+        int $now
+    ): bool|string {
+        Db::startTrans();
+        try {
+            $log = Db::name('tcm_diagnosis_auto_assign_log')
+                ->where('id', $logId)
+                ->lock(true)
+                ->find();
+            if ($log === null || $log === []) {
+                Db::rollback();
+
+                return sprintf('日志#%d：记录不存在', $logId);
+            }
+
+            if ((int) ($log['action'] ?? 0) !== 1) {
+                Db::rollback();
+
+                return sprintf('日志#%d：仅「已分配」记录可回退', $logId);
+            }
+            if ((int) ($log['rollback_time'] ?? 0) > 0) {
+                Db::rollback();
+
+                return sprintf('日志#%d：已回退，勿重复操作', $logId);
+            }
+
+            $diagnosisId = (int) ($log['diagnosis_id'] ?? 0);
+            $assignedAssistantId = (int) ($log['assistant_id'] ?? 0);
+            if ($diagnosisId <= 0 || $assignedAssistantId <= 0) {
+                Db::rollback();
+
+                return sprintf('日志#%d：数据不完整，无法回退', $logId);
+            }
+
+            $diag = Db::name('tcm_diagnosis')
+                ->where('id', $diagnosisId)
+                ->whereNull('delete_time')
+                ->lock(true)
+                ->field(['id', 'assistant_id'])
+                ->find();
+            if ($diag === null || $diag === []) {
+                Db::rollback();
+
+                return sprintf('日志#%d：诊单#%d 不存在', $logId, $diagnosisId);
+            }
+
+            $currentAssistantId = (int) ($diag['assistant_id'] ?? 0);
+            if ($currentAssistantId !== $assignedAssistantId) {
+                Db::rollback();
+
+                return sprintf(
+                    '日志#%d：诊单#%d 当前医助已变更（非自动分配的医助），跳过回退',
+                    $logId,
+                    $diagnosisId
+                );
+            }
+
+            $prevAssistantId = self::resolvePreviousAssistantIdFromAutoAssign(
+                $diagnosisId,
+                $assignedAssistantId,
+                (int) ($log['create_time'] ?? 0)
+            );
+
+            $poSnap = Db::name('tcm_prescription_order')
+                ->where('diagnosis_id', $diagnosisId)
+                ->whereNull('delete_time')
+                ->order(['create_time' => 'desc', 'id' => 'desc'])
+                ->field(['creator_id', 'create_time'])
+                ->find();
+            $relatedPoCreatorId = (int) ($poSnap['creator_id'] ?? 0);
+            $relatedPoCreateTime = (int) ($poSnap['create_time'] ?? 0);
+            if ($relatedPoCreateTime <= 0) {
+                $relatedPoCreateTime = $now;
+                $relatedPoCreatorId = 0;
+            }
+
+            Db::name('tcm_diagnosis')
+                ->where('id', $diagnosisId)
+                ->whereNull('delete_time')
+                ->update([
+                    'assistant_id' => $prevAssistantId,
+                    'assign_read_at' => $prevAssistantId > 0 ? null : 0,
+                ]);
+
+            Db::name('tcm_diagnosis_assign_log')->insert([
+                'diagnosis_id' => $diagnosisId,
+                'from_assistant_id' => $currentAssistantId,
+                'to_assistant_id' => $prevAssistantId,
+                'operator_admin_id' => $adminId,
+                'operator_name' => $adminName !== '' ? $adminName : '回退自动分配',
+                'operator_account' => $adminAccount,
+                'ip' => $ip,
+                'related_po_creator_id' => $relatedPoCreatorId,
+                'related_po_create_time' => $relatedPoCreateTime,
+                'is_inherit' => 0,
+                'create_time' => $now,
+            ]);
+
+            Db::name('tcm_diagnosis_auto_assign_log')
+                ->where('id', $logId)
+                ->update([
+                    'rollback_time' => $now,
+                    'rollback_admin_id' => $adminId,
+                    'rollback_admin_name' => $adminName,
+                ]);
+
+            Db::commit();
+
+            return true;
+        } catch (\Throwable $e) {
+            Db::rollback();
+            throw $e;
+        }
+    }
+
+    /**
+     * 从「系统自动分配」指派日志取 from_assistant_id 作为回退目标。
+     */
+    private static function resolvePreviousAssistantIdFromAutoAssign(
+        int $diagnosisId,
+        int $assignedAssistantId,
+        int $autoLogCreateTime
+    ): int {
+        $query = Db::name('tcm_diagnosis_assign_log')
+            ->where('diagnosis_id', $diagnosisId)
+            ->where('to_assistant_id', $assignedAssistantId)
+            ->where('operator_name', '系统自动分配');
+
+        if ($autoLogCreateTime > 0) {
+            $query->where('create_time', '>=', $autoLogCreateTime - 30)
+                ->where('create_time', '<=', $autoLogCreateTime + 30);
+        }
+
+        $row = $query->order('id', 'desc')->field(['from_assistant_id'])->find();
+        if ($row !== null && $row !== []) {
+            return (int) ($row['from_assistant_id'] ?? 0);
+        }
+
+        // 兜底：不限时间窗再查最近一条系统自动分配
+        $fallback = Db::name('tcm_diagnosis_assign_log')
+            ->where('diagnosis_id', $diagnosisId)
+            ->where('to_assistant_id', $assignedAssistantId)
+            ->where('operator_name', '系统自动分配')
+            ->order('id', 'desc')
+            ->field(['from_assistant_id'])
+            ->find();
+
+        return (int) ($fallback['from_assistant_id'] ?? 0);
+    }
+}
diff --git a/server/sql/1.9.20260717/add_auto_assign_log_rollback.sql b/server/sql/1.9.20260717/add_auto_assign_log_rollback.sql
new file mode 100644
index 00000000..0ff220ad
--- /dev/null
+++ b/server/sql/1.9.20260717/add_auto_assign_log_rollback.sql
@@ -0,0 +1,20 @@
+-- 自动分配日志：支持回退（撤回已自动分配的医助至上一任/一中心原医助）
+-- 表：zyt_tcm_diagnosis_auto_assign_log
+-- 接口权限：stats.autoAssignLog/rollback
+
+ALTER TABLE `zyt_tcm_diagnosis_auto_assign_log`
+  ADD COLUMN `rollback_time` int unsigned NOT NULL DEFAULT 0 COMMENT '回退时间戳，0=未回退' AFTER `create_time`,
+  ADD COLUMN `rollback_admin_id` int unsigned NOT NULL DEFAULT 0 COMMENT '回退操作人管理员ID' AFTER `rollback_time`,
+  ADD COLUMN `rollback_admin_name` varchar(64) NOT NULL DEFAULT '' COMMENT '回退操作人姓名' AFTER `rollback_admin_id`;
+
+SET @menu_id = (SELECT id FROM zyt_system_menu WHERE perms = 'stats.autoAssignLog/lists' LIMIT 1);
+
+INSERT INTO `zyt_system_menu`
+    (`pid`, `type`, `name`, `icon`, `sort`, `perms`, `paths`, `component`, `selected`, `params`, `is_show`, `is_disable`, `create_time`, `update_time`)
+SELECT
+    @menu_id, 'A', '回退自动分配', '', 1,
+    'stats.autoAssignLog/rollback', '', '',
+    '', '', 1, 0, UNIX_TIMESTAMP(), UNIX_TIMESTAMP()
+FROM DUAL
+WHERE @menu_id IS NOT NULL
+  AND NOT EXISTS (SELECT 1 FROM zyt_system_menu WHERE perms = 'stats.autoAssignLog/rollback');