The hydraulic control shut-off valve is mainly installed in the steam extraction pipeline of the turbine, the inlet pipeline of the blast furnace residual pressure power generation device (TRT) and other high safety level systems as an emergency shut-off valve; In case of a common crisis in the system, the emergency valve closing shall be implemented within 0.3-0.8 seconds to realize the cut-off of the pipeline, and the steam and condensate at the tail of the turbine shall flow back or cut off the pipeline to protect the safety of the turbine unit.