diff --git a/sec-beidou-rtcm/src/main/java/com/imdroid/sideslope/executor/D3F0SelfCheckMessageExecutor.java b/sec-beidou-rtcm/src/main/java/com/imdroid/sideslope/executor/D3F0SelfCheckMessageExecutor.java
index 6a37c2f1..06e28b5f 100644
--- a/sec-beidou-rtcm/src/main/java/com/imdroid/sideslope/executor/D3F0SelfCheckMessageExecutor.java
+++ b/sec-beidou-rtcm/src/main/java/com/imdroid/sideslope/executor/D3F0SelfCheckMessageExecutor.java
@@ -17,6 +17,7 @@ import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Component;
 
 import javax.annotation.Resource;
+import java.text.SimpleDateFormat;
 import java.time.LocalDateTime;
 import java.util.HashMap;
 import java.util.Timer;
@@ -68,7 +69,8 @@ public class D3F0SelfCheckMessageExecutor implements Executor<D3F0SelfCheckMessa
         device.updateRx(message.getHeader(),message.getLen(),1);
 
         ThreadManager.getFixedThreadPool().submit(() -> {
-            testAskICCID(device);
+            // 检查是否需要更新设备的 ICCID
+            checkAndAskICCID(device);
             // 检查是否需要对设备的F9P进行冷启动操作
             if(device.getDeviceType() == Device.DEVICE_ROVER){
                 if(device.getModel() == GnssDevice.MODEL_G505){
@@ -182,10 +184,20 @@ public class D3F0SelfCheckMessageExecutor implements Executor<D3F0SelfCheckMessa
         rtcmClient.config(device.getDeviceId(), sendCmd);
     }
 
-    void testAskICCID(Device device){
-        String sendCmd = "d31a000D0080F34C0141542B4943434944";
-        HttpResp<HashMap<String, Object>> rsp = rtcmClient.configByUdp(device.getDeviceId(),sendCmd);
-        logger.info(rsp.toString());
+    void checkAndAskICCID(Device device){
+        // 如果设备的 ICCID 存在，那么就不用发送 "AT+ICCID" 指令
+        if(device.getIccid() != null && !device.getIccid().trim().isEmpty()){
+            return;
+        }
+        String sendCmd = "AT+ICCID";
+        int msgType = 0xD310 + 10; // DTU
+        short len = (short) (sendCmd.length() + 5);
+        sendCmd = Integer.toHexString(msgType) + HexUtil.Short2HexString(len)+
+                HexUtil.Int2HexString(Integer.parseInt(device.getDeviceId()))+
+                "01"+HexUtil.String2HexString(sendCmd);
+        rtcmClient.configByUdp(device.getDeviceId(),sendCmd);
+        // TODO： 将这个消息写到 msg 表中
+        logger.info(sendCmd);
     }
     private void checkAndResetBTGnss(Device device){
         if(device.getNoFixedAndFloatResult()>0 &&device.getAbnormalD341Num()>10){
diff --git a/sec-beidou/src/main/java/com/imdroid/beidou/controller/APIController.java b/sec-beidou/src/main/java/com/imdroid/beidou/controller/APIController.java
index 4b31e751..8e0b64f1 100644
--- a/sec-beidou/src/main/java/com/imdroid/beidou/controller/APIController.java
+++ b/sec-beidou/src/main/java/com/imdroid/beidou/controller/APIController.java
@@ -59,6 +59,9 @@ public class APIController extends BasicController{
             //转成字符串
             String dtuAck = configAck.substring(9*2);
             rxInfo += configAck+"("+HexUtil.HexString2String(dtuAck)+")";
+
+            // 检查是否需要更新 ICCID
+            updateICCID(device,dtuAck);
         }
         else if(msgType == 0xd313&&configAck.length()>=100){
             //转成字符串
@@ -192,4 +195,20 @@ public class APIController extends BasicController{
         msgMapper.insert(gnssMsg);
     }
 
+    void updateICCID(GnssDevice device,String dtuAck){
+        if(dtuAck.contains("2B49434349443A")){
+            // “2B49434349443A” 是“ +ICCID: ”的十六进制数据串
+            // 如果部署 ICCID 的信息，那么就不要做下面的处理
+            return;
+        }
+        String content = HexUtil.HexString2String(dtuAck);
+        if(content.contains("+ICCID:")){
+            System.out.println(content);
+            String iccid = content.substring(content.indexOf("+ICCID:") + 8).trim();
+            iccid = iccid.split("\r\n")[0].trim();
+            // 更新设备的ICCID
+            device.setIccid(iccid);
+            deviceMapper.updateById(device);
+        }
+    }
 }
diff --git a/sec-beidou/src/main/resources/db/schema.sql b/sec-beidou/src/main/resources/db/schema.sql
index f4443aa1..901d785d 100644
--- a/sec-beidou/src/main/resources/db/schema.sql
+++ b/sec-beidou/src/main/resources/db/schema.sql
@@ -68,6 +68,7 @@ CREATE TABLE IF NOT EXISTS `gnssdevices` (
     `imei` varchar(16) DEFAULT NULL,
     `model` smallint DEFAULT 0,
     `loggingmode` smallint DEFAULT 0 COMMENT '日志模式: 0-精简模式(仅D3F0和D3F2), 1-完整模式',
+    `iccid` VARCHAR(36) DEFAULT NULL COMMENT 'ICCID号，唯一',
     PRIMARY KEY (`id`)
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
 
@@ -325,6 +326,9 @@ CREATE TABLE IF NOT EXISTS `ApiKey` (
     PRIMARY KEY (`id`)
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8;
 
+/***
+  GNSS 单次解记录表
+ */
 CREATE TABLE IF NOT EXISTS `gnssdevicesinglerecords` (
     `id` bigint NOT NULL AUTO_INCREMENT COMMENT '主键ID',
     `deviceid` varchar(64) NOT NULL COMMENT '设备ID',
@@ -337,4 +341,24 @@ CREATE TABLE IF NOT EXISTS `gnssdevicesinglerecords` (
     PRIMARY KEY (`id`),
     KEY `idx_deviceid_createtime` (`deviceid`,`createtime`),
     KEY `idx_createtime` (`createtime`)
-) ENGINE=InnoDB AUTO_INCREMENT=6 DEFAULT CHARSET=utf8 COMMENT='GNSS单次解算记录表';
\ No newline at end of file
+) ENGINE=InnoDB AUTO_INCREMENT=6 DEFAULT CHARSET=utf8 COMMENT='GNSS单次解算记录表';
+
+/***
+  SIM卡记录表
+ */
+CREATE TABLE IF NOT EXISTS `simcards` (
+    `id` INT NOT NULL AUTO_INCREMENT COMMENT '主键，自增，唯一',
+    `updatetime` DATETIME DEFAULT NULL COMMENT '最新一次查询接口记录的时间',
+    `iccid` VARCHAR(36) NOT NULL COMMENT 'ICCID号，唯一',
+    `msisd` VARCHAR(20) NOT NULL COMMENT '物联卡号码，SIM号，唯一',
+    `deviceid` VARCHAR(20) DEFAULT NULL COMMENT '设备ID号',
+    `status` TINYINT DEFAULT -1 COMMENT 'SIM卡状态（-1:未知, 1:待激活, 2:已激活, 3:停机, 4:注销, 5:库存, 6:可测试, 7:失效, 99:号码不存在）',
+    `remaining` DECIMAL(10,2) DEFAULT 0.00 COMMENT '剩余流量，单位为MB，保留两位小数',
+    `total` DECIMAL(10,2) DEFAULT 0.00 COMMENT '总流量，单位为MB，保留两位小数',
+    `used` DECIMAL(10,2) DEFAULT 0.00 COMMENT '已用流量，单位为MB，保留两位小数',
+    PRIMARY KEY (`id`),
+    UNIQUE KEY `uk_iccid` (`iccid`),
+    UNIQUE KEY `uk_msisd` (`msisd`),
+    INDEX `idx_deviceid` (`deviceid`),
+    INDEX `idx_status` (`status`)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COMMENT='SIM卡信息表';
\ No newline at end of file