Abstract: In order to reduce the defectives of rough filter edge and wrinkled tipping of cavity dual filter cigarettes made by MAX1-8 filter assembler, the support means, circular knife speed and specifications of final cutting unit were modified by means of Goryachkin's constant theorem and orthogonal test. The circular knife speed was raised up to 2 000 r/min, the optimal parameters were knife diameter 92 mm, thickness 0.2 mm and knife clampers' diameter 72 mm, under which the cutting force on filter cigarettes was effectively reduced. Cigarettes of brand "GU TIAN SHINE" were tested on PROTOS1-8 cigarette maker. The results showed that the amount of cigarettes with defective filter cut per thousand cigarette was zero, the consumption of cigarette paper and tipping paper decreased by 17 meters and 11.6 grams per thousand cigarettes. This method provides a technical support for promoting the cutting quality of dual filter cigarettes.