Since the company put forward the idea of grafting construction machinery hydraulic drive and electronic control technology to agricultural machinery in 2010, it took three years, through continuous design improvement and verification, and finally successfully launched in 2012 suitable for wheat harvesters and small corn harvesters. Machines and silage machines and other large grain combine harvesters800 series hydraulic drive axle,The bridge makes the manipulator easy to operate and greatly improves the comfort of the operation. At the same time, the clutch and the stepless torque increase device with high failure rate of the original mechanical shift bridge are eliminated from the design, which greatly improves the reliability of the whole machine. The test proves that the harvesting efficiency of the whole machine is increased by more than 30%.