The invention discloses an early warning method and early warning device based on a driving distraction state. The early warning method comprises the following steps: step one, acquiring traffic conditions and road conditions around a vehicle and identifying a driving behavior of a driver; step two, judging whether a distracted driving behavior exists or not according to the driver behavior, and if not, entering step three; if so, entering step 4; step three, judging whether the vehicle deviates from the lane or not based on the traffic conditions around the vehicle and the road conditions, ifnot, not sending out early warning and ending the early warning; if so, prompting the driver by voices, and ending the early warning after the prompt is finished; and step four, predicting an impending collision type and a lane deviation situation, and carrying out early warning of a corresponding level based on the predicted situation. According to the early warning device and the early warningmethod based on the driving distraction state, the risk level of the current driving behavior is judged based on the driving state of the driver, the driving environment and the vehicle attitude information and early warning can be performed according to the response state of the driver, so that traffic accidents are avoided.