guyuan brand full-feeding combine harvester (4ll-1.8dy) main features: 1. adoption of a combinative structure mechanism of a continuously variable transmission and a special-purpose gear box and the hydraulic booster steering, which is simple and convenient and high in working efficiency. 2. adoption of a double-layer cutting device, which is small in feeding load, thus making it more adaptable to the requirement for reaping of higher-yield crops. 3. adoption of hydraulically lifted reel, which is highly efficient in collapsed crops. 4. a combinative mechanism is adopted in the threshing, sieving and cleaning unit, which includes a combinative axial-flow cylinder, a lattice-type concave, a blowing/suction double air blower and a compound cleaning device consisting of a vibration screen and a dual-processor, which is small in loss and high in cleaning efficiency.