The utility model relates to a being fixed in the safety belt in the palmic rate measured module of the automobile -used safety belt of early -warning type of measuring palmic rate and respiratory frequency and shouldering and lie in the position that the heart was located, respiratory frequency measured module is fixed in on the abdominal safety belt binder of driver, palmic rate measured module and respiratory frequency measured module pass through signal lead line and are connected with the signal processing device. The signal processing device carries out operation respectively to the signal of palmic rate measured module and respiratory frequency measured module reconnaissance and obtains driver's palmic rate and respiratory frequency and contrast its threshold value with setting for, if the threshold range who surpasss the settlement in then the car is opened to the early -warning control module in the approved car early warning device make it send corresponding prompt tone. The utility model discloses neither influence driver's normal driving operation, can also forget the driver fasten the safety belt, driver fatigue or driver are healthy does not send the early warning in good time, remind the driver in time to adjust or keep to the side and stop, have improved driving safety greatly.