With the development of society, the smoking safety has attracted a wide spread attention. Cigarette draw resistance is an important performance index in tobacco enterprises. The traditional instrument has some disadvantage, such as high cost, slow speed and low precision. Therefore, an automatic sort instrument of cigarette draw resistance is developed, which has self-owned intellectual property. In the instrument, the output of all motors is connected with the mechanical device directly and the TMS320LF2407 chip is used as the controller. The system has been used in a cigarette factory in Shandong province. The result of the experiment shows that the instrument is reliable. In the paper, the control system design is introduced in details.