The running speed of the hydraulic press is determined so that the load of the hydraulic machine is large and the working pressure is high when the hydraulic machine worker enters. So, to ensure that the hydraulic pump does not overload, it needs to reduce the flow, that is to reduce the working speed of the hydraulic press; when the hydraulic press is back, its load is small and the working pressure is low. Therefore, when ensuring that the output power of the hydraulic pump does not exceed the output of the hydraulic pump, it can increase the flow rate and increase the working speed of the hydraulic press. In general, the running speed of a hydraulic press is only related to the flow rate. In other words, the flow is large, the speed is fast, the flow is small, and the speed is slow.