The invention relates to an oil production structure capable of achieving multi-oil-layer commingled production. The oil production structure comprises a polished rod, a plunger type annular partition plate, a casing head and the like. The polished rod is connected with a reversed-T-shaped annulus pipe through an overflow centralizer. An upper liquid outlet, a lower liquid outlet and an oil-gas partition plate are all connected with the casing head. The plunger type annular partition plate is connected with the oil-gas partition plate and the centralizer. The reversed-T-shaped annulus pipe is connected with a hollow sucker rod through a hollow centralizer. The hollow sucker rod is connected with a pump cylinder. The pump cylinder is connected with a fixing valve. The casing head is connected with a sleeve through a threaded seal ring. The sleeve is connected with a shaft bottom. The casing head is connected with an oil pipe. The oil pipe is connected with a screen pipe through the fixing valve. An upper side valve, an upper packer, a lower side valve and a lower packer are each connected with the oil pipe and the sleeve. The upper side valve comprises a seal ring and a valve ball. The oil production structure has the beneficial effects that the oil production structure can be used for three-layer commingled production with different pressures, the oil field oil production efficiency is improved, the production process is simplified, the production cost of oil fields is reduced, and the economic benefits of single-support multi-layer oil well production are improved.