The utility model provides a system for waste water is handled to fluidized phase subregion iron powder, including the reactor, separator, iron powder belt cleaning device, reactor is distinguished bythe lower supreme mud of scraping that communicates in proper order that is equipped with, the primary reaction district, the reaction zone is reinforceed to the one -level, the secondary reinforcement reaction zone, the solid -liquid separation district, it is linked together with waste water water intake pipe to scrape mud district water inlet, solid -liquid separation district management way is linked together with separator, separator still manage respectively way and waste water outlet, the iron powder belt cleaning device be linked together, iron powder belt cleaning device still managerespectively way and secondary reinforcement reaction zone, scrape mud district delivery port, waste water water intake pipe be linked together. The system provided by the utility model, realized theintegration reaction separation of iron powder and homogeneous mixing stirring, sediment and the retrieval and utilization of waste water, solved the iron material fixed bed easily the passivation harden, in the indisputable processing method of tradition micron iron particle skewness and the shortcoming that easily runs off, also avoided adopting the defect of the too high and difficult recoveryof nanometer iron cost.