▎ 摘　　要

NOVELTY - This new utility model claims of one of alkene double level filter core, it comprises two level filter grade, the first grade filter with built-in active coal grain, the second filtering level set with quartz sand granule, quartz sand grain and the covered surface graphene thin film layer. Between the two class level by non-woven cloth filter; the first filter grade close to the water inlet, the second grade filter close to the water outlet. This utility model new by graphene and activated coal double grade filter, increase of filtration effect.