The movement direction of the hydraulic cylinder is controlled by the hydraulic directional valve. The working pressure oil output from the hydraulic oil pump of the waste carton compression baler is passed along the pipe through the throttle valve and the hydraulic directional valve. . Under the effect of the working pressure oil of the waste paper packing machine, the piston rod moves upward, which promotes the organization to maintain the lifting posture. At this time, the hydraulic oil discharged from the upper chamber of the hydraulic cylinder flows to the oil tank through the ring groove and pipeline on the right side of the valve core of the hydraulic directional valve. The movement rate of the hydraulic cylinder is controlled by the throttle valve. The working pressure oil output by the hydraulic oil pump of the waste paper packer flows through this product and is divided into two ports, one to the hydraulic cylinder through the throttle valve and the other to the oil tank through the speed regulating valve. The throttle valve is like a tap, screwing the valve core, and changing the opening size, you can change the total flow of hydraulic oil into the hydraulic cylinder according to the throttle valve to manipulate the lifting rate. The load factor size of the hydraulic cylinder is controlled by the speed regulating valve. By adjusting the clamping force of the yellow spring in the speed regulating valve, the maximum working pressure of the hydraulic oil output by the hydraulic oil pump of the waste paper baler can be manipulated.