This paper takes the Huanghai-304 tractor-plowing set as example, applying the electro hydraulic proportion valve to replace the traditional hydraulic system as well as the sensor detection technology to collect real-time operating information, the closed loop control of hitch system which performs the plough resistance and position controlling is realized; and a control panel with.

According to three parameter models, which are burthen rate of engine, slide rate of driving wheel and work resistance, this paper studyies the cultivating unit.