diff --git a/STM32F103_App1/HardWare/UART/uart.c b/STM32F103_App1/HardWare/UART/uart.c
index d57b456..ba69846 100644
--- a/STM32F103_App1/HardWare/UART/uart.c
+++ b/STM32F103_App1/HardWare/UART/uart.c
@@ -393,7 +393,8 @@ uint16_t USART2_PollFrame(uint8_t *out, uint16_t out_size)
         char hex[3 * 24 + 1] = {0};
         uint16_t n0 = uart2_frame_len < 24 ? uart2_frame_len : 24;
         for (uint16_t k = 0; k < n0; k++) snprintf(hex + k * 3, 4, "%02X ", uart2_frame_buf[k]);
-        log_info("> UART2: 帧提交 %d 字节: %s", (int)uart2_frame_len, hex);
+        if (uart2_frame_buf[0] == 0x10) log_debug("> UART2: 帧提交 %d 字节: %s", (int)uart2_frame_len, hex);   /* 扩展板轮询帧降为 debug */
+        else log_info("> UART2: 帧提交 %d 字节: %s", (int)uart2_frame_len, hex);
         uint16_t len = uart2_frame_len < out_size ? uart2_frame_len : out_size - 1;
         memcpy(out, uart2_frame_buf, len);
         out[len] = 0;
@@ -412,7 +413,8 @@ void USART2_Tick(void)
         char hex[3 * 24 + 1] = {0};
         uint16_t n = uart2_cmd_index < 24 ? uart2_cmd_index : 24;
         for (uint16_t i = 0; i < n; i++) snprintf(hex + i * 3, 4, "%02X ", uart2_cmd_buf[i]);
-        log_info("> UART2: 帧提交 %d 字节: %s", (int)uart2_cmd_index, hex);
+        if (uart2_cmd_buf[0] == 0x10) log_debug("> UART2: 帧提交 %d 字节: %s", (int)uart2_cmd_index, hex);
+        else log_info("> UART2: 帧提交 %d 字节: %s", (int)uart2_cmd_index, hex);
         uart2_rx_ready = 1;
     }
 }