The invention discloses a gas-lift oil production one-round well completion pipe string and process. The well completion pipe string comprises an oil pipe, a feeding tool, a sealing device d, a packere, a punching pipe f and a plug g. The well completion process includes following steps: (1), lowering the pipe string; (2), setting the packer; (3), verifying sealing of the packer: verifying whether setting of the packer is successful or not; (4), releasing the feeding tool; (5), beating away a ball seat of the packer; (6), performing gas-lift production. According to the status quo of oilfieldgas-lift oil production technology, in order to solve the problems that two pipe strings needed to be lowered in conventional gas-lift oil production processes, packer releasing structure is in low-pressure releasing and fails in releasing and packers are difficult to salve, the pipe string is developed to complete pipe string lowering, packer setting, packer sealing verification, feeding tool releasing, packer ball seat beating-away and lift technology. The process is safe and reliable in releasing structure, can realize releasing after second-time ball throwing and ensures the releasing process to be completed successfully; V-shaped packing seal is adopted, so that sealing effect is good, and easiness for the pipe string to move is realized; letting-in through diameter is large, and smooth lowering of a tester can be realized; the pipe string is suitable for gas-lift oil production and gas-lift drainage gas production.