The invention relates to car sealing strip cutoff equipment for the car field. The car sealing strip cutoff equipment comprises a base plate, a supporting device, an adjusting device, a positioning device, a motor device, a support device, a buffer device and a cutting device; the base plate is provided with a first supporting rod and a first roller; the supporting device comprises a first support, a steel plate, a first supporting block and a supporting plate; the adjusting device comprises a second support, a first positioning rod, a first limiting rod, an adjusting rod, a third support, a first motor, a first output shaft and a first pull line; the positioning device comprises a positioning frame, a second limiting rod, a third limiting rod, a first spring, a movable plate and a first transverse rod; the motor device comprises a second motor, a second output shaft, a second pull line, a first vertical rod and a second roller; and the support device comprises a fourth support, a positioning plate, a first connecting ring, a second spring, a third spring, a first vertical plate, a fifth support, a third roller, a first fixing rod and a sixth support. By means of the car sealing strip cutoff equipment, car sealing strips can be effectively cut, and the cutting efficiency is high.