Spring tension and compression testing machine

The utility model relates to a spring tension and compression testing machine which comprises a base, two lead screws are vertically and rotatably arranged on the base, the two lead screws are in threaded connection with the same sliding frame, a driving mechanism used for driving the two lead screws to rotate is arranged on the base, a fixing device is arranged between the base and the sliding frame, and the fixing device comprises a first fixing piece and a second fixing piece. The first fixing piece is arranged on the upper surface of the base, the second fixing piece is arranged on the lower surface of the sliding frame and located above the first fixing piece, the first fixing piece comprises a first mounting column, two first fixing blocks and a first adjusting assembly, and the first mounting column is vertically arranged on the upper surface of the base and makes contact with the inner wall of the spring; the two first fixing blocks are arranged on the two sides of the first mounting column in a slidi