Abstract: Cigarettes of the same blend assembled with cellulose acetate(CA) filter and modified polypropylene(MPF) filter separately were used for studying their filtration effects for the harmful components in cigarette smoke,including tobacco-specific nitrosamines,aromatic amines,phenols,polycyclic aromatic hydrocarbons,ammonia and volatile carbonyl compounds.The results indicated that:for polycyclic aromatic hydrocarbons,the filtration efficiency of CA filter was higher than that of MPF filter,while it was on the contrary for ammonia;as for aromatic amines,tobacco-specific nitrosamines,volatile carbonyl compounds and phenols,the filtration efficiency of CA filter was slightly higher.