High-efficient dynamic transmission and high-precision static weighing were combined to develop a bulk food weighing and sorting system with high efficiency and precision. The conveyor belt was used to complete the uninterrupted transmission of the material in this system. Before weighing, the materials were arranged in rows successively, followed by a intermittent static weighing of the materials using a plurality of static weighing sensors, and then they felt to a classified packaging in turn. Combinating the static weighing and dynamic transmission, the high efficiency and precision bulk food weighing were undertaken, with the grading weight could be adjusted according to the actual needs of the system. Moreover, it could execute weighing 150 times per minute with the accuracy up to 0.1%, and the weighing error of high precision standard was only 0.002 kg. The above control system combined man-machine interface (HMI) with PLC combined control mode, and this was easy to operate and monitor remotely with strong reliability and high visualization.