Lane departure auxiliary system testing device and method

The invention discloses a device and method for testing a lane departure auxiliary system. The device comprises a plurality of electromagnetic pulse transmitters, an electromagnetic wave receiver and a vehicle-mounted computer located on a vehicle. The plurality of electromagnetic pulse transmitters are located on a lane line of a vehicle driving road in a test site, and the electromagnetic wave receiver is fixed outside a vehicle body and used for receiving electromagnetic wave signals transmitted by the plurality of electromagnetic pulse transmitters; the electromagnetic wave receiver is in wired connection with the vehicle-mounted computer; according to the method, a lane line coordinate system is established, the distance between each electromagnetic pulse transmitter and each electromagnetic wave receiver is combined, the minimum distance between a certain tire grounding point of the vehicle and a lane line on the corresponding side is calculated, and whether a deviation assisting system on the vehicle i