The present invention provides a gas sealed electric coupler comprising a plug and a socket. A connecting nut is arranged outside the plug shell, and a pre-hole insulator and a post-hole insulator that are insulated at a ultra-high temperature are arranged in the plug shell. A plurality of jack assemblies are formed in the pre-hole and a post-hole insulators; each jack assembly is in a hollow tubular shape and a corresponding first pin is arranged therein; and each first pin passes through the corresponding jack assembly and is located outside the plug shell. C-type and O-type metal sealing rings resistant to an ultra-high temperature and a high pressure are arranged between the front and rear shells of the socket; a glass insulator that is insulated at a ultra-high temperature and a plurality of second pins are arranged in the front shell of the socket, which are integrally formed by a glass sintering process; one end of each second pin is located outside the front shell of the socketand penetrates into the plurality of jack assemblies and is electrically connected with the first pin; and the other end enters the rear shell of the socket. The invention solves the problems of poorgas sealing performance, poor insulation shielding, high moisture absorption and poor environmental resistance in the application in an ultra-high temperature environment.