Comprehensive wastewater treatment system and wastewater treatment method

The invention relates to the technical field of wastewater treatment, in particular to a comprehensive wastewater treatment system and a wastewater treatment method. Comprising an outer cylinder, a driving motor, a transmission part, a first centrifugal cylinder, a second centrifugal cylinder, a cover plate and a cleaning mechanism, and the cleaning mechanism comprises a driving assembly, a first driving part, a second driving part, a first rotating shaft, a first cleaning brush, a second rotating shaft and a second cleaning brush. A first transmission gear drives a first driving part to rotate, so that a first cleaning brush on a first rotating shaft is used for cleaning impurities attached to the inner wall of a first centrifugal barrel, and a second transmission gear drives a second driving part to rotate; a second cleaning brush on a second rotating shaft is used for cleaning impurities attached to the inner wall of a second centrifugal barrel, so that the first centrifugal barrel and the second centrifug