Biological reaction sedimentation tank for sewage treatment

The utility model discloses a biological reaction settling pond for sewage treatment, which comprises a settling pond body, the interior of the settling pond body is divided into a plurality of biochemical ponds, and the biochemical ponds comprise a plurality of anoxic ponds, a plurality of anaerobic ponds and a plurality of aerobic ponds; the water inlet is formed in the side wall of one side of the anoxic tank, the inclined tube sedimentation tank is arranged on one side of the aerobic tank, and the water outlet is formed in the side wall of one side of the inclined tube sedimentation tank; a biological carrier filler is arranged in the biochemical tank, aeration equipment is arranged at the bottom of the biochemical tank, and an inclined tube is arranged in the inclined tube sedimentation tank. The system solves the problem that the sewage treatment cost is increased due to large occupied area and unsmooth water flow caused by a split structure of a biological reaction tank and a secondary sedimentation ta