Sewage treatment device

The invention relates to the technical field of sewage treatment and further discloses a sewage treatment device suitable for village and town areas. The sewage treatment device comprises a treatmentpool, wherein a collecting tank is arranged in the center of the bottom of the treatment tank in a communicating manner; a support frame is arranged in the center of the top of the treatment tank; a servo motor is arranged at the top of the supporting frame; a gear is coaxially and fixedly connected to the output end of the bottom of the supporting frame. A first toothed plate and a second toothedplate are symmetrically connected to the two sides of the gear in an engaged mode. Mounting frames are obliquely connected to the sides, close to each other, of the two positioning seats, placing grooves are symmetrically formed in the tops of the mounting frames, electric telescopic rods are fixedly connected to the interiors of the placing grooves, and the other sides of the two first sliding blocks are connected to a s