Abstract: Considering the problem with manual labor-intensive harvesting rice in the first crop of ratoon rice and the high harvest efficiency of the crawler harvester, which affects the germination and yield of the ratoon rice, this paper aims to demonstrate a whole-feed ratoon rice combine, which can complete the operation links in sequence one at a time such as harvesting, conveying, threshing and separating, straw crushing and auto-unloading of ratoon rice. In accordance with the design requirements of ratoon rice combine we design and calculate the technical parameters such as swath, feeding of crop, forward velocity, power and transmission route of the whole machine. Employing high-clearance four-wheel drive chassis, ground clearance of machine ≥600 mm, paddy-field solid wheel width 125 mm to ensure that the wheel can run between the two adjacent rice reducing the rolling to rice stubble when wheel running between the rice for harvesting. The field experiment showed that the rolling rate of ratoon rice combine is 27.5% lower than that of crawler rice combine, and the yield of ratoon rice is increased by 14.6%.

Key words: ratoon rice, combine harvester, high ground clearance, four-wheel drive