The invention relates to a sectional sugar cane combine harvester, which belongs to the agricultural machine field and comprises a topper shear plate, a left holding device of the sugar cane, a rightholding device of the sugar cane, a sugar cane pressing roller, a feeding roller, a cutter, a conveying roller, a plurality of upper conveying rollers, a plurality of down conveying rollers, a down cutting roller, an upper cutting roller, a frame, a lifter and a Level I trash separator. The utility model is characterized in that the sugar cane pressing roller, feeding roller and the cutter are arranged at both plates of the middle frame of the harvester from front to back and high to low; the back of the cutter is provided with the conveying roller, a plurality of the down conveying rollers and down cutting roller from front to back and low to high; a plurality of the upper conveying rollers are respectively arranged corresponding to a plurality of the down conveying rollers; the upper cutting rollers are arranged corresponding to the down cutting roller; the back of the upper and the down cutting rollers are provided with the lifters and the back up of the upper and down cutting rollers are provided with the Level I trash separator. The machine is used for the sugar cane harvest, can continuously finish lifting, topper cutting, feeding, conveying, cutting, trash separating, transportation and loading with high working efficiency.