Power supply surge protector

The invention discloses a power supply surge protector comprising a casing, wherein the casing is provided with an alarm lamp; the casing is provided therein with an external elastic wire, a safety toggle, a surge protector circuit component, and an over-current arc extinguishing device, a controller module, and a wireless module; the surge protector circuit component is connected in parallel withthe over-current arc extinguishing device; a circuit detecting module is connected in series with the over-current arc extinguishing device; the circuit detecting module and the controller module areelectrically connected; the controller module is electrically connected to the wireless module; the wireless module is wirelessly connected with a user communication device; the safety toggle is rotatably connected in the casing; when the voltage is normal, the safety toggle is connected with the surge protector circuit component; when the voltage is overloaded, the safety toggle is connected with the over-current arc ext