Cigarette filter stick containing membrane insert and cigarette

The invention relates to the technical field of tobaccos, in particular to a cigarette filter stick containing a membrane insert and a cigarette. The invention provides a cigarette filter stick containing a membrane insertion piece. The cigarette filter stick comprises a first tow section located at the end close to tobacco shreds, the porous membrane insertion piece and a second tow section located at the end close to a mouth. The first tow section, the porous membrane insertion sheet and the second tow section are the same in outer diameter and are in butt joint front and back in sequence; the porous membrane insert comprises a base material and a porous polymer/organic framework material membrane attached to the base material. According to the cigarette filter stick, the porous membrane insertion piece is arranged in the cigarette filter stick, all mainstream smoke can completely and continuously flow through the membrane insertion piece with the selective filtering function, and therefore the selective ad