The invention relates to an anticollision device for a cutting bed, which is mainly used for the field of cutting/engraving/laser processing equipment and the like. The anticollision device for the cutting bed comprises a collision plate, guide rails, a swing plate, opposite type photoelectric switches, a reflective type photoelectric switch, pullback springs, sliding groove plates and a base plate, wherein the collision plate is connected onto the guide rails through a movable base plate; the swing plate is arranged on a rotation shaft; the opposite type photoelectric switches are arranged on the collision plate; the opposite type photoelectric switches are fixedly arranged on the sliding groove plates; the pullback springs are connected onto the sliding groove plates and the guide rails; and the sliding groove plates are arranged on the base plate. The anticollision device for the cutting bed realizes anticollision protection through the collision plate and the swing plate; the barrier detection is realized by the opposite type photoelectric switches; the material protection is realized by the reflective type photoelectric switch; and the automatic resetting of the device is realized by the pullback springs.