The utility model discloses an automatic mahjong machine non -contact anti -pinch device, including desktop apron, singlechip S, central operation board, be located four directions rise the tablet board and with rise approximately tablet board of tablet board matched with, singlechip S is connecting sensor detection module SQ and motor driver module MQ, sensor detection module SQ is connecting infrared correlation sensor group SG and ultrasonic sensor MS, motor driver module MQ is connecting the MG of elevator motor group. The utility model discloses whether the well tablet board that rises contains the barrier in the lift in -process can initiatively detect out operating path, take non -contact's active protection, prevents to carry finger or other objects, adopts ultrasonic sensor detection distance to determine central operation board lift process in addition and has or not the centre gripping object, and the testing process is fast, the reliability is high, and the security performance and the operation smoothness nature of mahjong machine have obtained effectual improvement.