The invention relates to a USB C type plug connector, comprising an insulating body, two metal ground lugs, an upper terminal module, a lower terminal module and a front metal shell, wherein the insulating body comprises a top, a bottom, two opposite side parts connecting the top and the bottom, and a butt joint hole encircled by the top, bottom and two side parts, the top and the bottom are respectively provided with a through hole communicating with the butt joint hole, one ground lug is fixed at the top of the insulating body, the other ground lug is fixed at the bottom of the insulating body, arc-shaped abutting arms folding and stretching backwards are arranged at the front ends of the two ground lugs, the abutting arms penetrate through the through hole and then enter the butt joint hole, and the abutting arms have good elasticity, so that the elastic recovery capability is improved, and the service life can be prolonged.