The invention discloses a driving safety monitoring method based on a wristband of a driver. The method comprises the steps that when a vehicle is driven, the hand of the driver and the center of a steering wheel are located based on the wristband of the driver according to a sampling period; the distance between the hand of the driver and the center of the steering wheel is calculated, and whether or not the hand of the driver is placed on the steering wheel is judged; if hand of the driver is placed on the steering wheel, it is determined that the driver is in a normal driving state; if thehand of the driver leaves the steering wheel, it is determined that the driver is in an unsafe driving state; when the driver is in the normal driving state, whether or not the driver is in a safe driving state is further judged based on the heart rate, blood pressure, body temperature and respiratory rate of the driver, the in-vehicle temperature and the like. According to the driving safety monitoring method based on the wristband of the driver, when the driver is in an abnormal driving state and the unsafe driving state, an alarm is given to remind the driver, and the driving safety is improved.