In short, the correct choice of hydraulic valve has a great bearing on the success or failure of the system. As a hydraulic designer, he should have a more comprehensive understanding of the production situation of hydraulic valves at home and abroad, especially the performance of various hydraulic valves, and the replacement and replacement of new and old products. It is also necessary to go to the use site to understand the working conditions of the hydraulic valve. Only in this way can the correct and reasonable selection of the hydraulic valve be achieved.