The invention discloses a locking assembly with a quick spin locking function. The locking assembly is mainly characterized in that a plurality of auxiliary blocks which are protruded outwardly are arranged on the bottom surface of a screw head, an accommodating area is formed between each two adjacent auxiliary blocks, each auxiliary block is provided with a wall surface, a jacking wall and a cutting blade, the bottom of each auxiliary block extends upwards to form the corresponding wall surface positioned on one side of the corresponding accommodating area, and each wall surface is connected with the other side of the other corresponding adjacent accommodating area to form the corresponding jacking wall, and is connected with the jacking wall to form the corresponding cutting blade. During locking, a locked article is quickly cut when locked in the locking assembly owing to auxiliary cutting effects of the auxiliary blocks, chips generated after the locked article is cut are accommodated in the accommodating areas, the locking assembly is closely locked with the locked article, the chips cannot be protruded out of the locked articles after the locked article is locked with the locking assembly, the flatness is increased after locking, and effects of greatly increasing fastening force after locking and the like are realized.