Abstract: In order to prevent the bottom band from stagnation that causes wear strip deformation and compression band damage, the transmission system of bottom band in COMAS-A1 tobacco cutter was modified as follows: changing the front section of the wear strip from a flat type to a tooth type, increasing the tooth width of the drive roller, changing the smooth arc surface of arc guard plate to grooved surface, adding the number of fastening bolts to fasten the strips more tightly, and eliminating the clearance between the bottom band and the wear strips to avoid the friction between them. The results of finite element simulation analysis of the modified drive roller and arc guard plate verified that they were capable of production requirements. The modified system was tested with tobacco blend of"Septwolves"on a COMAS-A1 tobacco cutter in Xiamen Tobacco Industrial Limited Corporation, the results showed that the frequency of bottom band stagnation reduced from 0.55 times per hundred batches to 0 and about 34 thousand RMB yuan for spare parts and maintenance costs could be saved per year. This technology provides a support for the cost decreasing and efficiency increasing of primary processing equipment.