The utility model relates to a sewage treatment technical field especially relates to a materialization method and biological method ally oneself with coating wastewater processing system of usefulness. Including adjusting grit chamber, indisputable carbon micro electrolytic reactor, bio -contact oxidation tank, sedimentation tank, backwashing water pond, back flush pump, centrifugal pump, catch basin, aeration systems, its characterized in that: adjusting the grit chamber and passing through a circuit connection catch basin, centrifugal pump, centrifugal pump connection iron carbon micro electrolytic reactor's 1. End is connected to the catch basin, bio -contact oxidation tank is connected to iron carbon micro electrolytic reactor's 2. End, and bio -contact oxidation tank connects the sedimentation tank, the sedimentation tank passes through circuit no. 2 and connects the backwashing water pond, and the backwashing water pond is connected through back flush pump and indisputable carbon micro electrolytic reactor's 3. End, iron carbon micro electrolytic reactor's 4. End and regulation grit chamber are connected. The utility model has the advantages of advanced technology, reliable and stable, the operation management convenience of system's operation.