The utility model discloses an oval integrally-forged eccentric gas-lift mandrel for an oil and gas field, and is designed for solving the problem that the traditional eccentric gas-lift mandrel cannot meet the correlated operation requirements of gas-lift oil recovery. The eccentric gas-lift mandrel mainly comprises a cylinder and a valve bag, wherein the cylinder is composed of an oval eccentric cylinder at the middle segment and cylinders at reducing segment at two ends, and the valve bag is arranged on a semicircular cylinder on one side of the oval eccentric cylinder. According to the utility model, the mandrel is processed by adopting an integrally forging process, so that the material structure is improved and the material has the characteristics of uniform stress, no concentrated stress, pressure resistance and corrosion resistance; the mandrel has compact structure and light weight, saves the material, can create space for reversing and positioning of a salvage tool, and is favorable to salvage operation of a gas-lift valve; and the mandrel is suitable for continuous gas-lift oil recovery, gas-lift liquid discharging, drainage gas recovery and other various gas-lift oil recovery processes for the oil and gas field, and is excellent in the performance of improving liquid-producing capacity.