Hydraulic bracket micro-vibration dynamic characteristic testing bench

The invention discloses a hydraulic bracket micro-vibration dynamic characteristic testing bench. The hydraulic bracket micro-vibration dynamic characteristic testing bench comprises a foundation platform and driving legs; the driving legs and the foundation platform are in bolted connection through lower universal joints at bottom ends; the driving legs and a movable platform are in bolted connection through upper universal joints at top ends; a first pin hole plate is arranged at the middle part of a bottom end surface of the movable platform, a lifting oil cylinder is arranged on the firstpin hole plate, and the lifting oil cylinder penetrates the movable platform; the top of a piston rod of the lifting oil cylinder is connected with the middle part of the bottom end of a lifting platform through a second pin hole plate; first support beams are arranged at two sides of the lifting oil cylinders at the lifting platform, one end of the first support beam is connected with a second support beam through a thir