The invention relates to a USB C type plug connector, comprising an insulating body, an upper terminal module, a lower terminal module and a front metal shell. The USB C type plug connector also comprises an insulating sheath, wherein the front metal shell is protruded forwards out of the insulating sheath, the insulating sheath comprises a lantern ring with front and back hollow parts and two locking plates extending backwards from the top end to the bottom end of the lantern ring, the lantern ring is sleeved on the outer side of the front metal shell, one locking plate is positioned on the upper side of an insulating block, the other locking plate is positioned on the lower side of the insulating block, buckling holes and buckling blocks buckled together are arranged between the two locking plates and the upper and lower insulating blocks, and the structure strength of the USB C type plug connector is improved.