The invention discloses a high-capacity forced-oil circulation air cooler. A heat conduction core component of the high-capacity forced-oil circulation air cooler adopts an elliptic bimetal composite integral fin tube structure, corrugated groove openings are formed in a cooling tube fin, eddy current generators are arranged in parallel on inner fin tubes in the fin tube, blades of cooling fans are formed by compression molding of high-strength aluminum alloy plates, and each fan motor is formed by optimally combining three specifications of motors and is provided with forward-swept wing type blades, so the attack angle of the blades is expanded, the curvature of each part on the surface of each blade is changed, the centrifugal force of the fans is loaded to a mainstream, a laminar condition is ensured, the rotational speed is reduced, and low noise and high capacity of the cooler are achieved; and on the condition that the wind speed and the oil flow quantity are the same, the total heat conduction coefficient K value is improved by 30% than that of the same specification of a round fin tube product.