diff --git a/rc-service/rc-service-order/order-application/src/main/java/com/red/circle/order/app/command/pay/web/MiFaPayServerNoticeReceivePaymentCmdExe.java b/rc-service/rc-service-order/order-application/src/main/java/com/red/circle/order/app/command/pay/web/MiFaPayServerNoticeReceivePaymentCmdExe.java
index c9426c8d..c348ab6a 100644
--- a/rc-service/rc-service-order/order-application/src/main/java/com/red/circle/order/app/command/pay/web/MiFaPayServerNoticeReceivePaymentCmdExe.java
+++ b/rc-service/rc-service-order/order-application/src/main/java/com/red/circle/order/app/command/pay/web/MiFaPayServerNoticeReceivePaymentCmdExe.java
@@ -16,8 +16,9 @@ import lombok.RequiredArgsConstructor;
 import lombok.extern.slf4j.Slf4j;
 import org.springframework.stereotype.Component;
 
-import java.nio.charset.StandardCharsets;
-import java.util.Objects;
+import java.nio.charset.StandardCharsets;
+import java.security.MessageDigest;
+import java.util.Objects;
 
 /**
  * MiFaPay 支付回调通知处理
@@ -94,9 +95,9 @@ public class MiFaPayServerNoticeReceivePaymentCmdExe {
     private String handleMysqlOrder(MiFaPayReceivePaymentNotice notice,
                                     MiFaPayReceivePaymentNotice.MiFaPayNoticeData noticeData,
                                     OrderUserPurchasePay mysqlOrder) {
-        orderUserPurchasePayNoticeService.addNotice(
+        safeAddNotice(
                 mysqlOrder.getId(),
-                notice.getSign(),
+                buildNoticeEventId(noticeData, notice),
                 "mifapay-" + noticeData.getOrderStatus(),
                 notice,
                 mysqlOrder.getUpdateUser()
@@ -151,4 +152,57 @@ public class MiFaPayServerNoticeReceivePaymentCmdExe {
         Long mysqlOrderId = MiFaPayMysqlOrderSupport.parseOrderId(orderId);
         return mysqlOrderId == null ? null : orderUserPurchasePayService.getById(mysqlOrderId);
     }
-}
+
+    private void safeAddNotice(Long purchasePayId, String eventId, String noticeType, Object noticeData,
+                               Long operationUserId) {
+        try {
+            orderUserPurchasePayNoticeService.addNotice(
+                    purchasePayId, eventId, noticeType, noticeData, operationUserId);
+        } catch (Exception e) {
+            log.error("MiFaPay回调通知落库失败，继续执行支付主流程: purchasePayId={}, eventId={}, noticeType={}",
+                    purchasePayId, eventId, noticeType, e);
+        }
+    }
+
+    private String buildNoticeEventId(MiFaPayReceivePaymentNotice.MiFaPayNoticeData noticeData,
+                                      MiFaPayReceivePaymentNotice notice) {
+        String orderId = noticeData.getOrderId();
+        String bankOrderNo = noticeData.getBankOrderNo();
+        String mbOrderId = noticeData.getMbOrderId();
+        if (StringUtils.isNotBlank(orderId) && StringUtils.isNotBlank(bankOrderNo)) {
+            return "mifapay:" + orderId + ":" + bankOrderNo;
+        }
+        if (StringUtils.isNotBlank(orderId) && StringUtils.isNotBlank(mbOrderId)) {
+            return "mifapay:" + orderId + ":" + mbOrderId;
+        }
+        if (StringUtils.isNotBlank(orderId)) {
+            return "mifapay:" + orderId;
+        }
+        if (StringUtils.isNotBlank(bankOrderNo)) {
+            return "mifapay:bank:" + bankOrderNo;
+        }
+        if (StringUtils.isNotBlank(mbOrderId)) {
+            return "mifapay:mb:" + mbOrderId;
+        }
+        return "mifapay:sign:" + sha256Hex(Objects.toString(notice.getSign(), ""));
+    }
+
+    private String sha256Hex(String value) {
+        try {
+            MessageDigest digest = MessageDigest.getInstance("SHA-256");
+            byte[] hash = digest.digest(value.getBytes(StandardCharsets.UTF_8));
+            StringBuilder hex = new StringBuilder(hash.length * 2);
+            for (byte b : hash) {
+                String item = Integer.toHexString(b & 0xff);
+                if (item.length() == 1) {
+                    hex.append('0');
+                }
+                hex.append(item);
+            }
+            return hex.toString();
+        } catch (Exception e) {
+            log.error("MiFaPay回调sign生成SHA-256失败", e);
+            return "hash-error";
+        }
+    }
+}
diff --git a/rc-service/rc-service-order/order-domain/src/main/java/com/red/circle/order/domain/order/MiFaPayReceivePaymentNotice.java b/rc-service/rc-service-order/order-domain/src/main/java/com/red/circle/order/domain/order/MiFaPayReceivePaymentNotice.java
index a606fafd..34a07c09 100644
--- a/rc-service/rc-service-order/order-domain/src/main/java/com/red/circle/order/domain/order/MiFaPayReceivePaymentNotice.java
+++ b/rc-service/rc-service-order/order-domain/src/main/java/com/red/circle/order/domain/order/MiFaPayReceivePaymentNotice.java
@@ -69,6 +69,11 @@ public class MiFaPayReceivePaymentNotice implements Serializable {
          */
         private String mbOrderId;
 
+        /**
+         * 银行或通道订单号（平台回调返回，用于幂等事件标识）
+         */
+        private String bankOrderNo;
+
         /**
          * 商户唯一订单号（与下单时传入的orderId一致，用于匹配商户本地订单）
          */
diff --git a/sql/20260420_mifapay_order_mysql.sql b/sql/20260420_mifapay_order_mysql.sql
index facf4d1a..edc9c7c2 100644
--- a/sql/20260420_mifapay_order_mysql.sql
+++ b/sql/20260420_mifapay_order_mysql.sql
@@ -52,7 +52,7 @@ WHERE `receipt_type` = '';
 CREATE TABLE IF NOT EXISTS `order_user_purchase_pay_notice` (
   `id` bigint NOT NULL COMMENT '主键ID',
   `purchase_pay_id` bigint NOT NULL COMMENT '支付预订单ID',
-  `event_id` varchar(128) NOT NULL DEFAULT '' COMMENT '事件标识',
+  `event_id` varchar(512) NOT NULL DEFAULT '' COMMENT '事件标识',
   `notice_type` varchar(64) NOT NULL DEFAULT '' COMMENT '通知类型',
   `notice_data` longtext COMMENT '通知内容(JSON)',
   `create_time` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP COMMENT '创建时间',
diff --git a/sql/20260506_mifapay_notice_event_id_512.sql b/sql/20260506_mifapay_notice_event_id_512.sql
new file mode 100644
index 00000000..db97ce5f
--- /dev/null
+++ b/sql/20260506_mifapay_notice_event_id_512.sql
@@ -0,0 +1,19 @@
+SET @current_schema = DATABASE();
+
+SELECT CHARACTER_MAXIMUM_LENGTH
+INTO @notice_event_id_length
+FROM INFORMATION_SCHEMA.COLUMNS
+WHERE TABLE_SCHEMA = @current_schema
+  AND TABLE_NAME = 'order_user_purchase_pay_notice'
+  AND COLUMN_NAME = 'event_id'
+LIMIT 1;
+
+SET @ddl = IF(
+    @notice_event_id_length IS NOT NULL AND @notice_event_id_length < 512,
+    'ALTER TABLE `order_user_purchase_pay_notice` MODIFY COLUMN `event_id` varchar(512) NOT NULL DEFAULT '''' COMMENT ''事件标识''',
+    'SELECT 1'
+);
+
+PREPARE stmt FROM @ddl;
+EXECUTE stmt;
+DEALLOCATE PREPARE stmt;