Abstract: In order to investigate the effects of tipping paper permeability on the online draw resistance of cigarette, the online draw resistance of lit and unlit cigarettes was determined by an in-house analysis system, and the dynamic variation was analyzed. The results showed that:1) For the samples with the same tipping paper permeability, the puff-by-puff online draw resistance of lit cigarette was higher than that of unlit cigarette, and both of them decreased with the proceeding of puffing. 2) The filter ventilation rate of unlit cigarette decreased gradually with the sequence of puffing. 3)With the decrease of tipping paper permeability, the online draw resistance of the last puff of unlit and lit cigarettes decreased by 9.50%-20.51% and 1.96%-10.11% comparing with that of the first puff, respectively. For the samples with higher tipping paper permeability, the decline of online draw resistance slowed down gradually and the difference of online draw resistance between puffs was relatively stable. 4) The influence of tipping paper permeability on the online draw resistance of unlit cigarette was more obvious than on that of lit cigarette.