Surge protector

The invention discloses a surge protector. The surge protector comprises a protector, wherein a protection apparatus is arranged in the protector; the protection apparatus comprises a leakage current detection module, a singe chip microcomputer, an overheat detection module, a thermal protection module, a leakage current protection module and a lightning protection device; the leakage current detection module, the overheat detection module, the thermal current protection module and the leakage current protection module are connected with the singe chip microcomputer separately; and the singe chip microcomputer is used for controlling the leakage current protection module, the thermal protection module and the lightning protection device to take actions to restrain surge on a line, and overcurrent on a discharging circuit according to the line leakage current detected by the leakage current detection module and the line overheat condition detected by the overheat detection module so as to prevent connecting eq