The invention discloses a jacking axis offset measuring device and an application method thereof, which relate to the technical field of engineering machinery. The jacking axis offset measuring device is simple in structure, easy to operate and high in accuracy degree. The jacking axis offset measuring device comprises two anchoring structures, a measuring structure and a steel wire, wherein the two anchoring structures are used for fixing both ends of the steel wire; orthographic projection of the steel wire coincides with that of a designed jacking axis on the horizontal plane; the measuring structure comprises a measuring bracket, a measuring ruler and a measuring plumb bob, the measuring bracket is arranged on the steel wire and can move along the steel wire, the measuring ruler is arranged at the bottom part of the measuring bracket, the top part of the measuring plumb bob passes through an axis of the steel wire, a tip of the measuring plumb bob is close to the measuring ruler, orthographic projection of the measuring plumb bob coincides with that of the steel wire on the horizontal plane, and an arbitrary scale of the measuring ruler is parallel to the steel wire. The jacking axis offset measuring device and the application method thereof are used for measuring offset between a framework jacking axis and the designed jacking axis.