Abstract: Economic benefits of rice mechanized production in paddy field ploughing and leveling，rice seedling cultivation and transplanting，plant protection，harvesting，grain drying and other links were analyzed.At the same time，compared with traditional artificial cultivation，full mechanized production of rice has advantages of low labor consumption，high labor efficiency，stable yield，high output and high input output ratio.It is the only way to solve shortage of labor shortage，high cost and low efficiency in rice production.It is inevitable demand of sustainable development of agriculture.