Power supply surge protection device

The utility model belongs to the technical field of power devices, and particularly relates to a power supply surge protection device which comprises a left wiring support assembly, a left locking reed, a main contact piece, a main electrode piece, a piezoresistor, an auxiliary electrode piece, a tripping contact piece, a wire, an auxiliary contact piece, a right locking reed, a right wiring support assembly, a tension spring and an indicating piece. According to the power supply surge protection device, the inverted buckle matched with the base is designed on the module shell, the contact pieces can be firmly contacted through the design, and the power supply surge protection device is convenient to assemble and disassemble, and the service life of the power supply surge protection device is prolonged. The module and the base cannot be separated and loosened due to factors such as vibration in product transportation, the module cannot be pulled out of the base due to carelessness of a user in the installatio