NOVELTY - Continuous biological treatment device of municipal sewage, comprises a grille, a sand setting basin, a grit chamber and a sedimentation basin. The grit chamber is between the sand setting basin and the sedimentation basin, and the grit chamber comprises a pool body, a cover plate, a protection plate and an aeration diffusion device. The pool body is a groove-shaped body, the water inlet is mounted at front end, and sand setting basin is connected to water inlet hole, and the cover plate is mounted at the right side of top end of the pool body.    USE - Used as a continuous biological treatment device of municipal sewage.    ADVANTAGE - The device has excellent sewage treatment effect, and low base building investment and running cost.    DETAILED DESCRIPTION - Continuous biological treatment device of municipal sewage, comprises a grille, a sand setting basin, a grit chamber and a sedimentation basin. The grit chamber is between the sand setting basin and the sedimentation basin, and the grit chamber comprises a pool body, a cover plate, a protection plate and an aeration diffusion device. The pool body is a groove-shaped body, the water inlet is mounted at the front end, and the sand setting basin is connected to water inlet hole. The cover plate is mounted at the right side of the top end of the pool body, and there is a gap between the cover plate and the left side wall of the pool body, which is a free liquid surface, and there is an upward protection plate at four sides of the free liquid surface. The back side part of the top end of the pool body is opened, and a weir dam is formed at the top part of the back side wall of the pool body and connected to the sedimentation basin, and an aeration diffusion device is mounted at the bottom in the pool in the length direction of the pool body and closed to the right side wall.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic representation of the continuous biological treatment device of municipal sewage.