The electro - hydraulic control theory and design methods can be used in other construction machinery when electro - hydraulic reformed in remote control system . it is of importance as to the development of construction machinery in the future and technique content improved in construction machinery 本文中电液控制理论和设计方法可以应用于其它工程机械遥控系统电液改造,对将来工程机械发展、提高工程机械技术含量将有重要意义。