4YG-2A sized Corn Straw Harvester This machine has gained state patent, with scientific design, reasonable structure, flexible and convenient operation, good working function and simple maintenance, it adapts to harvest corn straw with kinds of planting methods and is the ideal equipment for your getting rich with little investment, which reduces labor force of farmers a lot, and it can fitted with 15,18 and 20 horsepower tractor and works by whole hanging, which is suited to harvest straight corn straw. 1) The harvester uses upright and front hanging connection and is made up by machine frame, changing direction and speed case, cutter axis, chain conveying unit and belt conveying unit etc. 2) Working principle: force from tractor output axis conveys to speed changing case, which make cutter axis rotate with high speed, and the other axis also rotates leaded by chains, then spinning knife under the cutter axis cut off corn straws, meanwhile, chain wheel on cutter axis make a directional and variable motion, which let conveying belt carry directionally, with the role of chains and conveying belt, straws are carried to the right of the machine and spread continuously in the field. Motor: 15、18、20 horsepower 　　Production rate : 4430m/h　　　 Knife axis numbers : 2 pieces Cutter numbers : 6 pieces　 　 Harvesting line :2 lines 　　Cutter turning semidiameter: 250mm Cutting soil depth: 20-30mm 　　　Cutting width : 1100mm 　　　　Weight : 200kg Overall dimension : 1360×450×940mm