Abstract: A transverse shift screw tail, a transverse adjustable spinal screw, and an implantation method. The screw comprises a screw tail and a screw seat, the screw seat has a rod groove used for placing a connecting rod, which is recessed downwards from the top of the screw seat and radially penetrates the screw seat, a bottom of the rod groove is a curved surface adapted to an outer circumferential surface of the connecting rod, and the rod groove is provided with a locking thread fit with a locking bolt. The screw tail comprises a fixing column capable of being screwed into a vertebral body and a platform located at an end portion of the fixing column, the platform is provided with the installation head used for connecting with the screw seat, and an eccentric distance is provided between a center of the installation head and an axis of the fixing column.