The utility model belongs to the technical field of waste water treatment, concretely relates to wastewater biochemical treatment integrated system, this system include first pressure filter, second pressure filter, third pressure filter, alkaline reduction decoloration pond, acid oxidation decoloration pond, acidification mediation pond, filter, good oxygen pond, anaerobism pond and discharge port. Through the utility model provides a wastewater biochemical treatment integrated system can carry out effectual processing to waste water on the one hand, and on the other hand can carry out the recovery processing to the emission among the wastewater treating processes again to there is not the influence to the processing procedure, thus the lift system treatment effeciency, and the reductionsystem discharges, avoids environmental pollution.