The performance of flow and heat transfer of three kinds of fin and tube heat exchangers including plane fin, average pitch wave-fin and increasing pitch wave-fin heat exchangers were numerically simulated with CFD software, and the distributions of temperature, pressure and velocity on each central plane of fluid region were obtained.In addition, the mean surface heat transfer coefficient and resistance coefficient of fin were measured under different wind velocity.The numerical results were proved to be correct by the available experimental data.The study indicates that Nu number of the increasing pitch wave-fin is 13.8%~29.3% higher than the plane fin, and 5.5%~10.3% higher than the average pitch wave-fin, thus achieving remarkable heat transfer enhancement.