diff --git a/bsp/bluetrum/ab32vg1-ab-prougen/board/Kconfig b/bsp/bluetrum/ab32vg1-ab-prougen/board/Kconfig
index 01752dad94..decdf156d7 100644
--- a/bsp/bluetrum/ab32vg1-ab-prougen/board/Kconfig
+++ b/bsp/bluetrum/ab32vg1-ab-prougen/board/Kconfig
@@ -167,11 +167,16 @@ menu "On-chip Peripheral Drivers"
                 default n
         endif
 
-    config BSP_USING_ONCHIP_RTC
+    menuconfig BSP_USING_ONCHIP_RTC
         bool "Enable RTC"
         select RT_USING_RTC
         select RT_USING_LIBC
         default n
+        if BSP_USING_ONCHIP_RTC
+            config RTC_USING_INTERNAL_CLK
+            bool "Using internal clock RTC"
+            default y
+        endif
 
     menuconfig BSP_USING_ADC
         bool "Enable ADC"
diff --git a/bsp/bluetrum/libraries/hal_drivers/drv_rtc.c b/bsp/bluetrum/libraries/hal_drivers/drv_rtc.c
index 2c5e39d4c2..4f462e9040 100644
--- a/bsp/bluetrum/libraries/hal_drivers/drv_rtc.c
+++ b/bsp/bluetrum/libraries/hal_drivers/drv_rtc.c
@@ -96,18 +96,33 @@ uint8_t irtc_sfr_read(uint32_t cmd)
     IRTC_EXIT_CRITICAL();
 }
 
+static void _init_rtc_clock(void)
+{
+    uint8_t rtccon0;
+    uint8_t rtccon2;
+
+    rtccon0 = irtc_sfr_read(RTCCON0_CMD);
+    rtccon2 = irtc_sfr_read(RTCCON2_CMD);
+#ifdef RTC_USING_INTERNAL_CLK
+    rtccon0 &= ~RTC_CON0_XOSC32K_ENABLE;
+    rtccon0 |= RTC_CON0_INTERNAL_32K;
+    rtccon2 | RTC_CON2_32K_SELECT;
+#else
+    rtccon0 |= RTC_CON0_XOSC32K_ENABLE;
+    rtccon0 &= ~RTC_CON0_INTERNAL_32K;
+    rtccon2 & ~RTC_CON2_32K_SELECT;
+#endif
+    irtc_sfr_write(RTCCON0_CMD, rtccon0);
+    irtc_sfr_write(RTCCON2_CMD, rtccon2);
+}
+
 void hal_rtc_init(void)
 {
     time_t sec = 0;
     struct tm tm_new = {0};
+    uint8_t temp;
 
-    uint8_t temp = irtc_sfr_read(RTCCON0_CMD);
-    temp &= ~RTC_CON0_XOSC32K_ENABLE;
-    temp |= RTC_CON0_EXTERNAL_32K;
-    irtc_sfr_write(RTCCON0_CMD, temp);
-    temp = irtc_sfr_read(RTCCON2_CMD);
-    irtc_sfr_write(RTCCON2_CMD, temp | RTC_CON2_32K_SELECT);
-
+    _init_rtc_clock();
     temp = irtc_sfr_read(RTCCON0_CMD);
     if (temp & RTC_CON0_PWRUP_FIRST) {
         temp &= ~RTC_CON0_PWRUP_FIRST;
@@ -119,7 +134,6 @@ void hal_rtc_init(void)
 
         irtc_time_write(RTCCNT_CMD, sec);
     }
-
 }
 /************** HAL End *******************/
 
diff --git a/bsp/bluetrum/libraries/hal_libraries/ab32vg1_hal/include/ab32vg1_hal_rtc.h b/bsp/bluetrum/libraries/hal_libraries/ab32vg1_hal/include/ab32vg1_hal_rtc.h
index 6c128567b5..483f3e3f42 100644
--- a/bsp/bluetrum/libraries/hal_libraries/ab32vg1_hal/include/ab32vg1_hal_rtc.h
+++ b/bsp/bluetrum/libraries/hal_libraries/ab32vg1_hal/include/ab32vg1_hal_rtc.h
@@ -34,7 +34,7 @@ enum
 
 // RTCCON0
 #define RTC_CON0_PWRUP_FIRST                (0x01u << 7)    /*!< RTC first power up flag            */
-#define RTC_CON0_EXTERNAL_32K               (0x01u << 6)    /*!< External 32K select                */
+#define RTC_CON0_INTERNAL_32K               (0x01u << 6)    /*!< Internal 32K select                */
 #define RTC_CON0_VDD_ENABLE                 (0x01u << 5)    /*!< RTC VDD12 enable                   */
 #define RTC_CON0_BG_ENABLE                  (0x01u << 4)    /*!< BG enable                          */
 #define RTC_CON0_LVD_OUTPUT_ENABLE          (0x01u << 3)    /*!< LVD output enable                  */