diff --git a/src/board/hardware.cpp b/src/board/hardware.cpp
index 672e058..2491ffd 100644
--- a/src/board/hardware.cpp
+++ b/src/board/hardware.cpp
@@ -239,13 +239,9 @@ void Hardware::fan_periodicJob() {
 /*******************************************************************************
  *                                   帕尔贴                                    *
  *******************************************************************************/
-void Hardware::peltier_cold_ctr_pwm(int pwm) {
-  STM32_HAL::setPWMDuty(&htim1, TIM_CHANNEL_1, pwm);
-}
+void Hardware::peltier_cold_ctr_pwm(int pwm) { STM32_HAL::setPWMDuty(&htim1, TIM_CHANNEL_1, pwm); }
 // PB0 HOT_CTR_PWM0
-void Hardware::peltier_hot_ctr_pwm(int pwm) {
-  STM32_HAL::setPWMDuty(&htim3, TIM_CHANNEL_3, pwm);
-}
+void Hardware::peltier_hot_ctr_pwm(int pwm) { STM32_HAL::setPWMDuty(&htim3, TIM_CHANNEL_3, pwm); }
 void Hardware::peltier_init() {  //
   STM32_HAL::gpioInitAsOutput(GPIOB, GPIO_PIN_1, GPIO_MODE_OUTPUT_PP, GPIO_PULLUP, GPIO_SPEED_FREQ_LOW, GPIO_PIN_RESET);
   STM32_HAL::gpioInitAsOutput(GPIOE, GPIO_PIN_10, GPIO_MODE_OUTPUT_PP, GPIO_PULLUP, GPIO_SPEED_FREQ_LOW, GPIO_PIN_RESET);
@@ -274,6 +270,12 @@ void Hardware::peltier_set_pwm(int pwm) {
    *     COLD_CTR_PWM0(BL) = 1(PWM)
    *     COLD_CTR(BH)      = 0
    */
+  if (m_peltier.pwm * pwm < 0) {
+    peltier_hot_ctr_pwm(0);                                /*HOT_CTR_PWM0*/
+    HAL_GPIO_WritePin(GPIOB, GPIO_PIN_1, GPIO_PIN_RESET);  /*HOT_CTR*/
+    peltier_cold_ctr_pwm(0);                               /*COLD_CTR_PWM0*/
+    HAL_GPIO_WritePin(GPIOE, GPIO_PIN_10, GPIO_PIN_RESET); /*COLD_CTR*/
+  }
   m_peltier.pwm = pwm;
   if (pwm == 0) {
     peltier_hot_ctr_pwm(0);                                /*HOT_CTR_PWM0*/