Stereoscopic container stable in supporting

The three-dimensional container comprises a container main body, a bottom plate is arranged at the bottom of the container main body, positioning pins are vertically arranged at the four corners of the bottom of the container main body and penetrate through the bottom of the bottom plate in a sliding mode, hinge seats are vertically arranged at the positions, away from the three sides of an opening of the container main body, of the top of the bottom plate, and the hinge seats are hinged to the bottom of the container main body. A driving shaft is rotatably inserted into the top of the hinge seat far away from one end of the opening of the container main body, driven shafts are transversely and rotatably inserted into the tops of the hinge seats close to the two ends of the opening of the container main body, and inclined supporting rods sleeve the middle positions of the peripheral surfaces of the driving shaft and the driven shafts; linkage pressure assemblies used for controlling the inclined supporting ro