Abstract: In order to simplify the work attachment manipulation system of a land leveler, a new type of it was presented in this paper which based on the pilot oil distribution method and the electro-hydraulic proportional control technology. The system work principle and the design process and the control process were thoroughly discussed. The experiment showed that through a four-channel distributor ten solenoid valves operations could be controlled by four electro-hydraulic proportional control valves which then the land leveler joystick could be simplified from ten to two and the maneuverability of the land leveler could be greatly improved. Using this method the number of electro-hydraulic proportional control valves in this system decreased from twenty to four, the cost of the manipulate control system decreased about seventeen percents and the reliability of it was improved greatly. This technology has been used on XZ8180A land leveler successfully.