Base plate positioning frame for turnout trial laying

The base plate positioning frame comprises a bottom plate, a sliding groove is axially formed in the top face of the bottom plate, assembling assemblies movably connected with the sliding groove are installed on the bottom plate in pairs, positioning columns are arranged on the outer sides of the assembling assemblies, and a plurality of grooves are formed in the positions, located on the two sides of the sliding groove, of the top face of the bottom plate. Adjusting blocks are movably mounted in the grooves, the upper ends of the adjusting blocks penetrate through the grooves to extend to the outside, extrusion blocks are mounted on the adjusting blocks, positioning blocks are fixed to the outer side faces of the extrusion blocks through bolts, positioning grooves are perpendicularly formed in the outer side end faces of the positioning blocks, one side face of each positioning column protrudes to form a positioning strip, and the positioning strips are slidably mounted in the positioning grooves. According