Lane changing risk early warning method and device

The invention discloses a lane changing risk early warning method and device, and belongs to the technical field of vehicles. A specific embodiment of the method comprises the following steps: acquiring airflow pressure detection data in a preset range of the outer side of a first vehicle; determining a pressure change path according to the pressure detection data; determining a lane changing intention of a second vehicle corresponding to the first vehicle according to the pressure change path; and according to the lane changing intention, a lane changing risk early warning prompt is sent out, so that collision between the first vehicle and the second vehicle is avoided. According to the embodiment, the lane changing intention of the surrounding vehicles is determined according to the airflow pressure data of the outer side of the vehicle, early warning prompt is given to the driver, and therefore the driver is assisted to control the vehicle, the occurrence rate of collision accidents caused by lane changing