Locking device for steel column in cup opening base

The utility model relates to the technical field of steel structure engineering, in particular to a locking device for a steel column in a cup mouth base, which comprises an outer support, an inner support and a wedge support, the outer support and the inner support jointly provide a wedge-shaped accommodating space for the wedge support, the outer support comprises an outer support body, an outer support plate and a screw rod, the lower part of the outer support body is in a rectangular plate shape, and the upper part of the outer support body is in a cuboid block shape; each outer supporting plate is in a right trapezoid plate shape, one side of the right-angle side of each outer supporting plate is perpendicularly connected to one face of the corresponding outer supporting body, the multiple outer supporting plates are evenly arranged on the outer supporting bodies at intervals in parallel to form outer supporting grooves, the upper portions and the lower portions of the two side faces of the outer support