The YFA-A type safety valve hydraulic testing bench integrates machinery, electricity, and fluid into one, suitable for flanged and threaded safety valves. It uses a flange flat seal and features a worktable with a uniformly installed movable hydraulic clamp. It can automatically synchronize and adjust the position of the clamping jaws according to various valve specifications, achieving automatic centering and positioning. During valve testing, the hydraulic clamp jaws automatically grip the flange plane of the valve, with adjustable clamping force, exerting no external force on the valve being tested. The clamping process is fully controlled by an integrated button, executed by hydraulic components.