Shoulder-strap buckle

The utility model aims to overcome the shortcomings in the prior art and provides a shoulder belt clasper capable of preventing the shoulder belt from sliding laterally. The shoulder belt clasper comprises an upper belt ring and a lower belt ring, wherein the bottom edge of the inner ring of the lower belt ring is provided with skidproof teeth. The shoulder belt clasper has the advantages that the skidproof teeth on the inner ring of the lower belt ring effectively prevent clasper ears of the clothes from sliding laterally, thereby avoiding the phenomenon that the clothes biases toward. Moreover, the design of the skidproof teeth can be applied to the prior structures of an 8-shaped shoulder belt clasper and a 9-shaped shoulder belt clasper. The shoulder belt clasper has the advantages of simple structure, low production cost and good practical effects.