The invention relates to the technical field of valves, in particular to a two-way pressure high-temperature butterfly valve. The two-way pressure high-temperature butterfly valve comprises a valve body, wherein pipelines are fixedly connected to outer surfaces of the left side and the right side of the valve body through flange plates; an adjusting mechanism is fixedly connected to the center of the front end of an annular outer surface of the valve body; the adjusting mechanism comprises a connecting cylinder, a worm, a hand wheel, a driving chamber, a turbine, a connecting rod, butterfly plates and a cover plate; and the connecting cylinder is fixedly connected to the center of the front end of the annular outer surface of the valve body. According to the invention, the adjusting mechanism is arranged, and the two butterfly plates are attached to the valve body, so that the double-sealing effect is achieved, the two-way pressure high-temperature butterfly valve is suitable for working conditions that a butterfly valve is required to have a two-way sealing function, and the purpose of enhancing overall sealing performance of the butterfly valve is achieved; and a first semi-ring and a second semi-ring are arranged, and the first semi-ring and the second semi-ring are used for limiting and supporting the butterfly plates, so that the situation that when the butterfly plates are closed, the butterfly plates need to bear large pressure caused by fluid on the butterfly plates, and the butterfly plates are prone to deformation after long time is avoided.