Fastener capable of preventing looseness

The utility model relates to the technical field of anti-seismic supports and hangers, and discloses an anti-loosening fastener which comprises a fastener body and a bearing structure, the fastener body comprises G-shaped channel steel and an anchor rod, the two ends of the anchor rod are both connected with hinge devices, each hinge device comprises a first special-shaped piece, a hinge shaft seat and a second special-shaped piece, a first connecting block is arranged at one end of the anchor rod, a first bolt is arranged in the first connecting block in a penetrating mode, a second connecting piece is arranged at the other end of the anchor rod, and a second bolt is arranged at one end of the second connecting piece in a penetrating mode. The hinge device comprises a special-shaped piece and a hinge shaft seat, the air pipe is lifted through the hinge support, when an earthquake occurs, plastic deformation caused by rigid connection of the bearing structure and the air pipe by a fastener is avoided, the tra