Anti-falling fastener

The utility model provides an anti-falling type fastener. The anti-falling type fastener comprises a mechanical part body, a bolt is arranged in the mechanical part body, a nut is arranged outside the bolt, a nut auxiliary anti-falling assembly is arranged at the position, located on one side of the bolt, in the mechanical part body, and the nut auxiliary anti-falling assembly comprises a rotating groove; a rotating rod is rotationally connected between the two sides of the inner wall of the rotating groove through a bearing. According to the anti-falling type fastener, the nut is arranged to assist the anti-falling assembly, the gasket can be limited, the stability of the bolt is guaranteed by limiting the gasket, the bolt is prevented from rotating reversely, and therefore connection between the bolt and the nut can be stabilized, and due to the matched arrangement of the limiting assembly, the anti-falling type fastener is not prone to falling off. And the connection between the bolt and the nut can be fur