Building-block plane structure mechanical property universal experiment platform

The invention relates to a building-block plane structure mechanical property universal experiment platform, which comprises a base, upright posts, a cover plate, a plurality of crossbeams, diversified support saddles, test rod pieces and connecting pieces, wherein the base is provided with a horizontal slide groove with the upper opening, and a first fixed support saddle and a slide support saddle are installed on any positions of the horizontal slide groove; the outer side of each upright post is provided with a vertical slide groove and is connected with the crossbeams through an L-shaped connecting plate so as to realize the free vertical elevation of the crossbeams; the crossbeams are installed at two sides of the two upright posts in parallel, the crossbeams are provided with a plurality of lateral horizontal slide grooves to realize the installation of a second fixed support saddle, a slide hinge support saddle, a limiting support saddle and a loading device soleplate on any positions; and the test rod