Hydraulic clamp type hard seal butterfly valve, with the butterfly plate as the opening and closing member, drives the butterfly plate to rotate 90 ° through a hydraulic actuator to achieve pipeline connection and flow regulation. Specially designed for emergency cut-off scenarios with large diameters and high pressure differentials, it adopts a metal hard seal structure and is suitable for high-temperature and particle containing media conditions. Hydraulic actuators have high output torque and fast response speed, which can quickly cut off pipelines in case of accidents. They are suitable for key pipeline systems in industries such as oil and gas, and have the characteristics of reliable sealing, strong power, and rapid cutting off.