A rapid-switching high-frequency waveguide switch comprises an electric coupler (1), a motor assembly (2), a shell body (3) and a guided assembly (4). The electric coupler (1) and the motor assembly (2) are fixed above the shell body (3), and the shell body (3) is buckled and connected on the guided assembly (4). The guided assembly (4) achieves switching of two radio frequency passages through two arch-shaped passage holes. The motor assembly (2) is used as a drive system, achieves rapid rotation of a guided rotor, produces location locking torque, and achieves movement precise control and movement location of ninety-degree-angle movement. The rapid-switching high-frequency waveguide switch has the advantages of being simple and reliable in structure, low in difficulty of processing and assembling, free from introducing extra non-metallic material, capable of achieving rapid switch of a switch on the premise of guaranteeing the microwave performance of the switch.