A surge protection device. The surge protection device includes a base and a protection module; the protection module includes inverted snaps, a slide groove, a PCB, a light guide column, and a Type-C interface; the base includes a lower housing, a cover, a grounding piece, wiring terminals, wire plugging ports, clips, inverted snap grooves, bus pins, and grounding clips; each wiring terminal includes a pressing block, a U-shaped elastic piece, and a copper busbar; the base and the protection module are connected by means of the clips, the inverted snap grooves, and the inverted snaps; and the slide groove is of an error-proof design. According to the present invention, wire plugging and unplugging can be achieved without using tools, and ordered arrangement of wires is achieved; in addition, a 30 kA instantaneous current or a larger impact current can be resisted.