The application extension and parameter design of the key assembly of 9QS-1000 model silorator are expounded in this paper.This machine is hitched to the tractor of 48kw to put into operation without necessaries of aligning with crop rows.The functions cutting and chopping and blowing-out are carried out simultaneously and the height of stubble is adjusted by hydraulic control.The result of extension indicates that the index meet the requirements design and silage harvesting technology.The pure unit hour pr...