Large-cross-section box column and processing technology thereof

The invention relates to the technical field of building structures, and particularly relates to a large-cross-section box column and a processing technology thereof. An auxiliary stiffening plate, a small stiffening plate and a positioning pin are connected between a bottom plate and a cover plate; a main stiffening plate and an upper cover stiffening plate are connected with the side surface of the box column; the main stiffening plate is connected with the bottom plate and the cover plate; a cross column and an inner partition plate are connected with the inside of the box column; and the structures are gradually connected into a whole through part preparation, welding of an H-shaped girder, welding of the box column, welding of a base and thermal treatment after welding. The product is efficient and fast to prepare, so that the large-cross-section box column is high in bearing capacity and high in stability.