Numerical calculations were performed to analyze the characteristics of air flow and heat transfer inside the elliptical tube finned channels of air cooler used in power stations，and the effects of fin pitch，fin thickness，head wind air velocity and ambient temperature on heat transfer coefficient and flow resistance were discussedNumerical simulation results showed that both heat transfer coefficient and pressure drop increased with the increase of head wind air velocity.The fin pitch had little effect on heat transfer coefficient，but had a significant effect on pressure drop and the total amount of heat transfer inside the finned channelsIn addition，the heat transfer coefficient and pressure drop increased with the increase of fin thicknessThe results will provide a reference to the design and experiment of the air coolers used for the power stations.