On the basis of analyzing the present situation of rice harvest mechanization,aiming at the present problems existing in the process of harvesting the rice with traditional combine harvester,this paper points out using the axial-flow cylinder to improve the present combine harvester.Improving its working properties,adapting to harvesting rice,and bringing its use value into play,are important transition for threshing and harvesting machine to enter into the paddy field.This paper also provides some references to improve the technology of rice combine harvest.