The invention discloses an intelligent division control system of a tobacco threshing unit, comprising multi-grade supplied-material conveying belts which are obliquely arranged on the upper part of a machine body in the same direction, wherein a return roller which is opposite to the operation direction of each-grade supplied-material conveying belt is installed in a space which is formed between the head and the tail end of each-grade supplied-material conveying belt, and a thresher which is provided with a drive threshing roller is arranged on the lower part opposite to the return roller of each-grade supplied material conveying belt, and the lower part of each-grade thresher is opposite to a complete output conveying belt. Each-grade return roller and the drive threshing roller of the thresher are connected with the corresponding division control system. The division control system collects the work current of the thresher in real time and compares the work current with the pre-set value in a central control system so as to automatically analyze whether the return roller of a proportional divider moves and analyze the moving direction and distance.