The invention relates to the field of cutting equipment, in particular to an automatic cutting device used for PVC plate continuous cutting. The automatic cutting device comprises a bearing platform used for supporting PVC plates, a limiting device used for limiting the PVC plates, a cutting device, a pushing device used for driving the PVC plates to move to the cutting device and a control device; and the limiting device comprises a first limiting assembly used for limiting the PVC plates, a second limiting assembly used for limiting the PVC plates and a first driving assembly used for driving the first limiting assembly and the second limiting assembly to move in the opposite direction, the pushing device comprises an abutting assembly abutting against the ends of the PVC plates on the bearing platform and a second driving assembly used for driving the abutting assembly to move, the cutting device comprises a cutting machine and a third driving assembly used for driving the cutting machine to move, and the control device comprises a controller and a sensor assembly electrically connected with the controller. By means of the automatic cutting device, the efficiency in the cuttingprocess is improved, the PVC plates are automatically cut, and unnecessary labor cost is avoided.