Electro-hydraulic servo building structural member fatigue loading test device

The utility model discloses an electro-hydraulic servo building structural member fatigue loading test device, and relates to the technical field of test loading. The test bench comprises a test bench assembly, a moving assembly and a rotating assembly. The top of the test bench assembly is slidably provided with a moving assembly. The top of the moving assembly is rotationally matched with multiple rotating assemblies. The threaded cylinder moves up and down on the circumferential side face of the threaded rotating rod and drives the two symmetrical sliding blocks to relatively slide on the top of the U-shaped moving frame, and under the acting force of the elastic spring, the two matched protection battens hinged to one side face of each sliding block are used for clamping and fixing materials and parts; the fixed support of materials and parts with different widths is realized; by starting the transmission motor, the two symmetrical U-shaped moving frames in threaded running fit move oppositely on the bend