Small rail car for large plate ingot casting

The utility model relates to the technical field of carrying trolleys, in particular to a rail trolley for large slab ingot casting, which comprises a frame assembly used for loading a casting mold, the inner wall and the upper end face of the frame assembly are provided with heat insulation layers, and casting mold positioning blocks which are oppositely distributed are arranged on the front portion and the rear portion of the upper end of the frame assembly. A U-shaped positioning groove is formed in the upper end face of the casting mold positioning block, a heat insulation plate is arranged between the bottom end of the casting mold positioning block and the upper end face of the frame assembly, rail wheel assemblies are arranged at the four corners of the outer side face of the frame assembly, and side supports used for installing the rail wheel assemblies are arranged on the frame assembly. When high-temperature casting molds are loaded, trolley deformation caused by the fact that heat of the casting mo