The invention discloses a ramie combine harvester which comprises a ramie pulling device, a ramie cutting mechanism, a travel mechanism, a horizontal transportation device, a ramie pulling turning device, a ramie distribution conveying device, a double-cylinder ramie decorticating mechanism, a cutting device, a clamping device and a finished product collection box which are sequentially arranged. The ramie pulling device, the ramie cutting mechanism, the horizontal transportation device and the ramie pulling turning device are fixed on the same support to form a header, the header and the travel mechanism are combined to finish harvesting, the ramie distribution conveying device, the clamping device and the cutting device are fixed on another support, and the ramie distribution conveying device, the clamping device, the cutting device, the double-cylinder ramie decorticating mechanism and the finished product collection box jointly finish decorticating ramie. By the aid of the ramie combine harvester, ramie stalks can be cut, ramie fibers and sticks can be separated once, harvesting efficiency is high, all procedures such as scraping and machining are automatically finished, the separation rate of the ramie fibers, ramie peels and the sticks reaches more than 94%, and subsequent ramie decorticating mechanical separation and high-quality ramie yield are facilitated.