Filtering device

The utility model discloses a filter device in the technical field of sewage treatment, which comprises a filter box and a cover plate, a rotating component and a third filter screen are arranged at the lower part of the filter box, the third filter screen is connected with an annular baffle and a jacking component, and a liquid inlet pipe, a rotating cylinder and a pressing plate are arranged on the cover plate. A bottom plate, a cylindrical first filter screen and a cylindrical second filter screen are arranged between the pressing plate and the rotating assembly, sewage is subjected to two-stage filtration through the first filter screen and the second filter screen, and after the liquid inlet pipe stops conveying the sewage, a treating agent is added to further treat the sewage, so that the filtering effect is improved; a third filter screen and an annular baffle plate move upwards through a jacking assembly, so that the treated sewage is filtered by the third filter screen and then is discharged; the rot