▎ 摘　　要

NOVELTY - The composite filter stick (1) comprises a first acetate fiber filter stick (3) and a second acetate fiber filter stick (4), where the first and second acetate fiber filter sticks are filled with large pore volume silica gel and aminated graphene modified active carbon, where largest aperture of the large pore volume silica gel is 6-10 nm and the pore ratio of 0.8-2 nm aperture in the aminated graphene modified active carbon is more than 80 percentage. An end of the second acetate fiber filter stick is connected with the first acetate fiber filter stick. Another end of the second acetate fiber filter stick is connected with a cigarette main body (2). USE - Composite filter stick for reducing propionic acid in cigarette (claimed). ADVANTAGE - The composite filter stick can reduce the irritation of the cigarette, and does not affect the whole fragrance and style characteristic of cigarette, improves the oral flexibility, comfort, and smell absorbing quality. The adding material is non-toxic and harmless, realizes manufacturing of sticks in convenient manner and reduces production cost. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a cigarette. DESCRIPTION OF DRAWING(S) - The drawing shows a sectional view of a cigarette of the composite filter stick. Composite filter stick (1) Cigarette main body (2) First acetate fibre filter stick (3) Second acetate fiber filter stick (4)