Filter stick with quaternary composite structure and multiple functions

The utility model provides a filter stick with a quaternary composite structure and multiple functions. The quaternary composite filter stick with the multifunctional structure is provided with quaternary composite units and sequentially comprises a first filter unit section (4), an activated carbon cavity unit section (3), a second filter unit section (2) and a hollow pipe unit section (1), and the four units are compositely wrapped and formed through forming paper. After the cigarette is connected, smoke filtration, smoke aroma enhancement (or filtration), smoke filtration and smoke diffusion path change are realized, so that the smoking satisfaction of the cigarette is improved while the smoking taste is improved, the sensory quality requirements of consumers on the smoke are met, and meanwhile, the appearance attractiveness of the cigarette can be improved due to the novel appearance. 本实用新型提供一种四元复合结构具有多重功能的滤棒。它具有四元复合单元，所述四元复合具有多功能结构的滤棒依次包括第一过滤单元段(4)、活性炭空腔单元段(3)、第二过滤单元段(2)、空管单元段(1)，并通过成形纸把四个单元复合包裹成型。通过接装卷烟