Water filter structure

The invention relates to a water filter structure. The water filter structure comprises a cigarette holder, a front cigarette holder converter, a rear cigarette holder converter, a filtering pipe, a front semi-permeable membrane and a rear semi-permeable membrane; the cigarette holder is in insertion fit with the rear cigarette holder converter; the front cigarette holder converter and the rear cigarette holder converter are respectively arranged at both ends of the filtering pipe; the front semi-permeable membrane is arranged between the filtering pipe and the front cigarette holder converter; the rear semi-permeable membrane is arranged between the filtering pipe and the rear cigarette holder converter; and a flared part of which an inner diameter is gradually increased in the process ofextending to the other end from the end part is formed at one end of the filtering pipe, which is adjacent to the front cigarette holder converter. The suction experience of the water filtering cigarette holder adopting the