The invention provides an offset-bow centralizer device. The offset-bow centralizer device comprises a centralizer body, wherein stop rings are arranged at two ends of the centralizer body, the centralizer body is in a hollow structure, and comprises a plurality of support ribs arranged uniformly circumferentially, a gap is formed between every two adjacent support ribs, the support ribs are in a structure of asymmetrical offset bow, and bow parts of every two adjacent asymmetrical offset bow structures are staggered. An offset-bow support device is added to a traditional centralizer, welding points are reduced, and an overall structure is adopted, so that the centralizer device has a high casing centralizing effect and large annulus flow area, and displacement efficiency of circulating drilling fluid can be effectively improved; when a casing enters an inclined shaft section or a horizontal section, a casing body cannot be closely attached to the bottom of a borehole, the centralizing effect is good, a friction area is reduced, and accordingly, a frictional resistance coefficient between the casing and the well wall is reduced, frictional resistance is greatly reduced, and the casing is fed into a shaft smoothly.