The metal hard seal lifting plug valve uses the first lifting and closing valve operation mode, which greatly reduces the opening and closing torque of the cock valve, and is different from the traditional cock valve using the rectangular diameter channel. The valve usually uses a circular channel to reduce the fluid resistance of the cock valve greatly, and the metal hard sealing lift type cock valve is also used. The ball valve and the gate valve are a little bit, can be used in high temperature and high pressure conditions, and greatly expand the use scope of the stopcock.