The invention provides an open type USB socket comprising an insulating body, a terminal set formed in the insulating body and a reinforcing piece embedded in the insulating body, wherein the insulating body comprises a base body part, a front end part formed by extending from the bottom side and the two transverse sides of the base body part in the forward direction, a butt joint tongue part formed in the front end part by extending from the base body part in the forward direction, and an accommodating cavity formed in the front end part and opening at the upper end. The butt joint tongue part is arranged in the accommodating cavity, the accommodating cavity comprises a bottom wall, two transverse side walls and an end surface, and the end face is the end face, close to one side of the accommodating cavity, of the base body part, the reinforcing piece comprises a main body part which is embedded into the upper surface of the base body part, a welding foot which extends out of the insulating body from the main body part, and a stop part clamped into the upper part of the end face by punching downwards from the front end part of the main body part. The open type USB socket is used for removing the metal shell to reserve a clearance area for the mobile phone antenna design.