The invention relates to a device for testing unfolding of missile wings under a multi-angle high-speed rotation condition of a missile body, in particular to research on the rotating characteristic of the missile body under different angles, and belongs to the field of experimental research design of a high-speed rotating platform. The device comprises a probe, a transmission rod, a pre-tightening spring, a straight sliding type potentiometer, a voltage acquirer, a fixed-value resistance, a power source, a shell, a shell cover and a limiting bolt. The angle and the rotating speed of the missile body in a flying state are simulated through the rotating table, and the device, for testing unfolding of the missile wings, installed in the rotating table represents whether the missile wings are completely unfolded and locked by conducting, amplifying and detecting the displacement of a fixing pin. The two ends of the missile body are fixed to be connected with a support through the rotating table, and it is guaranteed that the missile body can stably rotate under a high rotating speed. The straight sliding type potentiometer is adopted for the testing device, a displacement signal of the pin is linearly converted into an electric signal, and the testing result can better perform representation and display.