The invention relates to a micro-electromechanical system (MEMS) movable electrode-type spark gap switch in the technical field of MEMS. The MEMS movable electrode-type spark gap switch comprises a movable electrode, a fixed electrode, a micro drive structure and an insulated substrate, wherein the movable electrode and the fixed electrode are fixedly connected with the insulated substrate, the micro drive structure is fixedly connected with the insulated substrate and the movable electrode or is respectively and fixedly connected with the insualted substrate and the movable electrode, and the fixed electrode and the movable electrode are placed facing to each other and on the same side of the insulated substrate. The MEMS movable electrode-type spark gap switch disclosed by the inventionhas the advantages that the amount of the required working energy is small, the requirement on the energy of the trigger capacitor of the micro drive structure can be reduced, the volume of the trigger capacitor can be greatly reduced, the cost and the system volume can be reduced, and the integration is facilitated.