Abstract: PASSIM filter cigarette maker has the shortcomings of insufficient suction on the trough rail surface, cut tobacco might slip over the suction band during high speed running, which resulted in loose end cigarette and unstable cigarette weight, therefore, the maker was improved as following: 1)changing the front and rear rails into an symmetric ladder-like arrangement; 2)changing the curved cross section of the rails into an inclined plane; 3)using stainless steel as rail's base material with ceramic spray coating on its working surface. After improvements, the problem of cut tobacco slipping was solved, the variation of dense end location and profile of cut tobacco stream during high speed running were avoided. The standard deviation of cigarette weight and the rate of loose end cigarette decreased by 3.5 mg and 0.3%, respectively. The control precision of cigarette quality was improved.