Abstract:The self designed flappingwing vehicle with two degrees of freedom (2DoF) is taken as a research object. The curve of flapping angle and torsion angle of the vehicle were fitted and written it to the User Define Function (UDF) program to couple with Fluent fluid solver. The average lift coefficient, thrust coefficient and energy coefficient during movement were analyzed, then, which results compared with flappingwing vehicle with a single degree of freedom (1DoF). The results show that the average lift coefficient of the flappingwing with 2DoF is 188 times higher than that of the flappingwing with 1DoF, and the average thrust coefficient is increased by 175 times, at the same time, average energy coefficient of the flappingwing with 2DoF reduced by 275%, which has better lift efficiency and propulsion efficiency. It shows that the designed flappingwing vehicle with 2DoF can generate enough lift for flying, and has better aerodynamic performance than the traditional flappingwing vehicle with 1DoF.