Platform and method for machining joint of underground diaphragm wall steel box and socket and spigot type reinforcing mesh

The invention provides an underground diaphragm wall steel box and socket type reinforcing mesh connector machining platform which comprises a plurality of supports arranged in a row in parallel, limiting plates fixed to the two sides of the supports and roller structures fixed to the supports, and the limiting plates comprise the first limiting plate and the second limiting plate. The machining platform is divided into a steel box structure lengthening area and a reinforcing mesh machining area in the arrangement direction of the supports, the first limiting plate is located in the steel box structure lengthening area, the second limiting plate is located in the reinforcing mesh machining area, and the height of the top of the first limiting plate is larger than that of the top of the roller structure. The height of the top of the second limiting plate is equal to or smaller than that of the top of the roller structure, the roller structure supports the steel box and enables the steel box to slide in the arr