Abstract: In order to investigate the effects of length and position of grooved section in grooved acetate filter on cigarette smoke, 35 kinds of grooved filter were prepared to make cigarette samples, and cigarette smoke was analyzed. The results showed that:1)For cigarette with a filter containing one grooved section, the length of grooved section obviously affected the total particulate matter(TPM), tar, nicotine, and moisture contents in mainstream cigarette smoke with quadratic relationships;while the position of grooved section did not. CO delivery was not obviously affected by the length or the position of grooved section. 2)In the cigarette samples with a filter containing two grooved sections, the total length of the two grooved sections obviously affected the yields of mainstream cigarette smoke, while the effects of positions of grooved sections were slight when the total length of grooved sections was fixed. 3)With the increase of length of grooved section, the filtration efficiency of filter to TPM and nicotine increased first then decreased, it peaked at the length of 20 mm.