A cicada was regarded as a research object. Firstly

its wing movement equations were gotten by analyzing the cicada's movement images from high-speed camera. Then

a three-dimensional model of the cicada's wing was established

and the numerical simulation method of flow field around the cicada's wing was studied based on Fluent software. Finally

the average lift and drag coefficients of the three-dimensional cicada's wing model were analyzed under the situation of different movement parameters (flapping frequency

flapping amplitude and maximum torsional angle). The research result shows that the maximum torsional angle greatly impacts the aerodynamics of cicada's wing

so the torsional movement must be considered in the design and manipulation of the flapping-wing maro air vehicles mimicking cicada.