Supercritical methane heat exchangers are widely used in engineering practice. The heat transfer law of supercritical methane is special and compalicated due to the drastic change of physical properties near the pseudo-critical tempaerature. Based on the principle of Compautational Fluid Dynamics ( CFD) ，the finite volume method is used to simulate the turbulent flow and heat transfer characteristics of supercritical methane. On the basis of verifying the reliability of the model，the influences of curvature radius of bent tube，vertical and horizontal arrangement of U-type tube on the heat transfer characteristics are analyzed. The results show that: when heat flux q = 80 kW /m2，mass flow G = 75 kg( m2·s) ，and inlet tempaerature Tin = 180 K，the dean vortex strength decreases with the increase of curvature radius of the bent pipe. The convective heat transfer coefficient at the bent tube increases with the increase of the curvature radius. In addition，compared with the horizontal arrangement，the vertical arrangement of U-type tube has a stronger supercritical methane heat transfer capacity. The results of this paper provide guidance for the performance optimization of supercritical methane heat exchanger.