Tailor welding method for stand column of pressure machine tool

According to the tailor-welding method for the pressure machine tool stand columns, at least two stand columns are included, each stand column is of a cuboid structure, and each stand column comprises an upper bottom plate, a lower bottom plate, a front side plate, a rear side plate, a left side plate, a right side plate, an inner supporting plate and a guide rail plate. The welding method comprises the following steps: splicing: placing lower bottom plates, front side plates, rear side plates, left side plates and right side plates of the two upright posts on a platform to splice into a cuboid structure without a cover, enabling the front side plates and the rear side plates of the two upright posts to be flush, and enabling the left side plate of one upright post to be attached to the right side plate of the other upright post, the inner supporting plate is located in the cuboid structure without the cover. The two stand columns are fixedly connected through a plurality of connecting blocks, and the connect