The utility model belongs to the technical field of knitting circular knitting machine, refer in particular to a knitting circular knitting machine tensioning roller, including the tensioning roller main part, the equal symmetry in tensioning roller main part both ends is provided with adjusts the sliding ring installation department, it adjusts sliding ring installation position to be provided with a plurality of on the regulation sliding ring installation department, the cover is equipped with the sliding ring that is less than regulation sliding ring installation position number on adjusting the sliding ring installation department, all be provided with outer chamfering on the outer end wall of regulation sliding ring and tensioning roller main part, adjust the inner chamfering who is provided with on the inner pore wall of sliding ring with the outer chamfering looks adaptation of adjacent regulation sliding ring or tensioning roller main part, a plurality of regulation sliding ring accessible axial displacement change the tractive width of tensioning roller main part. The utility model discloses putting the knitting into production, when especially putting the wool surface fabric into production, having solved the surface fabric easy appearance friction aurora of borduring, the defect that can't overcome has been avoided to the inhomogeneous crease that causes of atress.