The tubing head, connecting to the top casing head or minimal casing string, is a component for appending tubing and sealing annular between casing and tubing, in addition, it can also be serviced as fracturing wellhead assembly together with casing head and accessories for tubing fracturing, annular fracturing or mixed fracturing. Its structure can be divided into flanged style and clamped-in style by joint type, irrespectively fitting for different status. The tubing hanger can be matched for conical or straight seat to append different tubing, and its sealing style holds two style, namely, metal and nonmetal style(show in following chart), to suit for the engineering requirements of any time. The tubing thread can adopt API tubing thread or TM thread.