The utility model relates to a perforation seperated layer water injection integration tubular column belongs to oil field exploitation technical field. By oil pipe, go up water injection mandrel, packer, down water injection mandrel, ball seat, perforation rifle constitutes, oil pipe, go up water injection mandrel, packer, water injection mandrel, ball seat, perforation rifle threaded connection in proper order down, the packer is located between water injection mandrel, the lower water injection mandrel. The beneficial effects of the utility model are that through the combination that utilizes water injection mandrel, packer and perforation rifle, solve the loaded down with trivial details problem of well workover in -process process, can realize once accomplishing perforation, water injection process, convenient operation improves the efficiency of construction, practices thrift the operating cost.