Complete-suspension activated sludge process integrated treatment device used for town sewage treatment

The utility model provides a complete-suspension activated sludge process integrated treatment device used for town sewage treatment. The device comprises a round secondary sedimentation tank; a secondary sedimentation tank scum well, a fine rack water inlet channel, a grit chamber, a secondary sedimentation tank sludge well, an anaerobic tank and an aerobic tank are arranged around the periphery of the secondary sedimentation tank to form an annular tank body; the bottom of the inner annular tank wall of the anaerobic tank and the bottom of the inner annular tank wall of the aerobic tank are respectively provided with a flow pushing mixing stirring device, the bottom of the aerobic tank is provided with an aerating device, down-flow sewage flows into another tank from holes reserved between the tank walls due to pressure differences, ultimately water flowing out from the aerobic tank enters the secondary sedimentation tank, and sludge and water are separated. By means of optimized combination of the sewage t