Sludge treatment sedimentation tank with high sedimentation rate

The utility model discloses a sedimentation tank with high sedimentation rate for sludge treatment, which belongs to the technical field of sludge treatment and comprises a feeding and screening shell, a feeding hole is formed in one side of the upper end of the feeding and screening shell and is used for feeding sludge, and a dosing hole is formed in the other side of the upper end of the feeding and screening shell; the stirring and screening assembly is arranged in the feeding and screening shell and is used for stirring, screening and settling the sludge; the aeration discharging assembly is arranged in the feeding and screening shell and located below the stirring and screening assembly, and aeration operation is carried out in the screened sludge; the discharging and settling shell is arranged on one side of the feeding and screening shell; the stirring and draining assembly is arranged in the discharging and settling shell and is used for stirring the screened and fed sludge and carrying out solid-liqu