The utility model provides a sling protection structure of a suspension bridge. The upper end of the suspension bridge sling is fixed with the suspension bridge cable through a cable clamp; wherein the lower end of the sling is anchored with a suspension bridge steel truss girder, the sling is sleeved with a protective sleeve, the protective sleeve comprises two semicircular cylinders, the two sides of each semicircular cylinder are each provided with a pressing plate extending outwards along the diameter of the semicircular cylinder, bolt holes are formed in the pressing plates in advance, and the two semicircular cylinders are oppositely buckled on the sling and fastened by bolts through the bolt holes in the pressing plates; the lower end of the protective sleeve abuts against the lowerend anchor head of the sling, and the upper end of the protective sleeve and the sling are sealed through sealant. According to the utility model, the anti-corrosion material on the sling can be prevented from being damaged, and the sling is effectively protected.