diff --git a/components/modbus/modbus_block_host.cpp b/components/modbus/modbus_block_host.cpp
index 749510c..2f1621e 100644
--- a/components/modbus/modbus_block_host.cpp
+++ b/components/modbus/modbus_block_host.cpp
@@ -2,7 +2,7 @@
 
 #include "modbus_basic.hpp"
 using namespace iflytop;
-#define DEBUG 0
+#define PRV_DEBUG 0
 ModbusBlockHost::ModbusBlockHost() {}
 ModbusBlockHost::~ModbusBlockHost() {}
 
@@ -16,7 +16,7 @@ void ModbusBlockHost::cleanRxBuff() {  //
 
 void ModbusBlockHost::uarttx(uint8_t *buff, size_t len) {
   ZASSERT(len < sizeof(txbuff));
-#if DEBUG
+#if PRV_DEBUG
   printf("uarttx:\n");
   for (size_t i = 0; i < len; i++) {
     printf("%02x ", buff[i]);
@@ -30,7 +30,7 @@ bool ModbusBlockHost::uartrx(uint8_t *buff, size_t len, int overtimems) {
   ZASSERT(len < sizeof(rxbuff));
 
   status = HAL_UART_Receive(huart, buff, len, overtimems);
-#if DEBUG
+#if PRV_DEBUG
   if (status == HAL_OK) {
     printf("uartrx:");
     for (size_t i = 0; i < len; i++) {