diff --git a/modbus/modbus_block_host.cpp b/modbus/modbus_block_host.cpp
index c3712c6..9c52a34 100644
--- a/modbus/modbus_block_host.cpp
+++ b/modbus/modbus_block_host.cpp
@@ -58,8 +58,8 @@ bool ModbusBlockHost::uartrx(uint8_t *buff, size_t len, int overtimems) {
       if (m_dump) {
         if (status == HAL_OK) {
           printf("uart_rx:");
-          for (size_t i = 0; i < len; i++) {
-            printf("%02x ", buff[i]);
+          for (size_t byteoff = 0; byteoff < len; byteoff++) {
+            printf("%02x ", buff[byteoff]);
           }
           printf("\n");
         }
@@ -117,7 +117,7 @@ bool ModbusBlockHost::readReg03(uint8_t slaveAddr, uint16_t regAddr, uint16_t *r
 //   return str;
 // }
 
-bool ModbusBlockHost::readReg03Muti(uint8_t slaveAddr, uint16_t regAddr, uint16_t *regVal, int regNum, int overtimems) {
+bool ModbusBlockHost::readReg03Muti(uint8_t slaveAddr, uint16_t regAddr, int regNum,uint16_t *regVal,  int overtimems) {
   zlock_guard lck(m_modbus_lock);
 
   txbuff[0] = slaveAddr;
@@ -201,3 +201,31 @@ bool ModbusBlockHost::writeReg10(uint8_t slaveAddr, uint16_t regAddr, uint16_t r
   }
   return false;
 }
+
+bool ModbusBlockHost::writeReg10Muti(uint8_t slaveAddr, uint16_t regAddr,int regNum, uint16_t *regVal,  int overtimems) {
+  zlock_guard lck(m_modbus_lock);
+  txbuff[0] = slaveAddr;
+  txbuff[1] = 0x10;
+  txbuff[2] = regAddr >> 8;
+  txbuff[3] = regAddr & 0xff;
+  txbuff[4] = 0x00;
+  txbuff[5] = regNum;
+  txbuff[6] = regNum * 2;
+  for (int i = 0; i < regNum; i++) {
+    txbuff[7 + i * 2]     = regVal[i] >> 8;
+    txbuff[7 + i * 2 + 1] = regVal[i] & 0xff;
+  }
+  modbus_pack_crc_to_packet(txbuff, 7 + regNum * 2 + 2);
+
+  cleanRxBuff();
+
+  uarttx(txbuff, 7 + regNum * 2 + 2);
+
+  bool status;
+  status = uartrx(rxbuff, 8, overtimems);
+
+  if (status && modbus_checkcrc16(rxbuff, 8)) {
+    return true;
+  }
+  return false;
+}
diff --git a/modbus/modbus_block_host.hpp b/modbus/modbus_block_host.hpp
index 7d394f2..5be1ff8 100644
--- a/modbus/modbus_block_host.hpp
+++ b/modbus/modbus_block_host.hpp
@@ -12,7 +12,7 @@ class ModbusBlockHost {
 
   zmutex m_modbus_lock = {"m_modbus_lock"};
   bool   m_dump        = false;
-  Pin_t  rePin = PinNull;
+  Pin_t  rePin         = PinNull;
 
   ZGPIO txEnGpio;
 
@@ -23,10 +23,12 @@ class ModbusBlockHost {
   void initialize(UART_HandleTypeDef *huart, Pin_t rePin = PinNull);
   void enableDump(bool enable);
 
-  bool readReg03(uint8_t slaveAddr, uint16_t regAddr, uint16_t *regVal, int overtimems);
-  bool readReg03Muti(uint8_t slaveAddr, uint16_t regAddr, uint16_t *regVal, int regNum, int overtimems);
   bool writeReg06(uint8_t slaveAddr, uint16_t regAddr, uint16_t regVal, int overtimems);
+
+  bool readReg03(uint8_t slaveAddr, uint16_t regAddr, uint16_t *regVal, int overtimems);
+  bool readReg03Muti(uint8_t slaveAddr, uint16_t regAddr, int regNum, uint16_t *regVal, int overtimems);
   bool writeReg10(uint8_t slaveAddr, uint16_t regAddr, uint16_t regVal, int overtimems);
+  bool writeReg10Muti(uint8_t slaveAddr, uint16_t regAddr, int regNum, uint16_t *regVal, int overtimems);
 
  private:
   void cleanRxBuff();