Flight parameters of tethered dragonflies (Anax goliathus), Hercules beetles (Allomyrina dichotoma), and cicadas (Oncotympane maculaticollis) are measured by insects flight kinematics measurement system. The flapping trajectory of wing tip, deformation of wing are analyzed in the process of the flapping. The result shows that the wings' flapping frequency of dragonflies, Hercules beetles, and cicadas are 22±3, 30±5 and 39±6 Hz, respectively. Furthermore, the flapping trajectory of dragonflies is "8" shape, beetles's is similar to "8" shape and cicadas's is ellipse shape. In the process of down-stroke and supination when insects flapping, the structure of the wing looks like umbrella-shaped. The umbrella-shaped mode can raise the lift force effectively. The study of insects' wings flapping mode can inspire the design of man-made micro-air vehicle(MAV).