diff --git a/components/driver/uart.c b/components/driver/uart.c
index 2fc8dbf0bb..fe2a5cc8e7 100644
--- a/components/driver/uart.c
+++ b/components/driver/uart.c
@@ -631,7 +631,10 @@ esp_err_t uart_param_config(uart_port_t uart_num, const uart_config_t *uart_conf
     uart_hal_set_tx_idle_num(&(uart_context[uart_num].hal), UART_TX_IDLE_NUM_DEFAULT);
     uart_hal_set_hw_flow_ctrl(&(uart_context[uart_num].hal), uart_config->flow_ctrl, uart_config->rx_flow_ctrl_thresh);
     UART_EXIT_CRITICAL(&(uart_context[uart_num].spinlock));
+    // The module reset do not reset TX and RX memory.
+    // reset FIFO to avoid garbage data remained in the FIFO.
     uart_hal_rxfifo_rst(&(uart_context[uart_num].hal));
+    uart_hal_txfifo_rst(&(uart_context[uart_num].hal));
     return ESP_OK;
 }