The invention discloses a layered air injection tubular column, comprising outer tube, inner tube, channeled packer, balancing packer, safety injection valve, well washing packer, supporting fastening tile, circulating valve,
sieve tube, and thread stopper, and also comprising a flow dividing
check valve connected between the channeled packer and balancing packer, where the outer tube is connected to the channeled packer, the inner tube passes through the channeled packer and arranged in the flow dividing
check valve, the balancing packer, and the bottom of the balancing packer is in sequence connected with the safety injection valve, well washing packer, supporting fastening tile, circulating valve,
sieve tube and thread stopper. The invention has effective and accurate layered injection function,
corrosion-sustaining agent injection function, less operating load, and low cost, applied to air injection or
water flooding process of
petroleum recovery.