Abstract: Aiming at low cigarette yield and high electrical failure rate of cigarette weight control system in PASSIM cigarette maker, a new designing scheme of cigarette weight control system based on TMS320LF2407A DSP was proposed. The hardware and software design of this system were introduced in detail. The system hardware design mainly includes data acquisition interface circuit, cleaver position control circuit, and CAN bus interface circuit; The software were consists of main program, data acquisition subroutine, fuzzy control subroutine, and cleaver position control subroutine. The results showed that the new cigarette weight control system has higher control accuracy and smaller cigarette quality standard deviation, and can effectively improve the cigarette yield. At the same time, this system also has the characteristics of good online monitoring function.