High-strength anti-loose combined bolt

The utility model relates to the technical field of bolts, in particular to a high-strength anti-loosening combined bolt which comprises a nut, the lower end of the nut is connected with a first screw, and an anti-loosening assembly is arranged on the first screw. The anti-loosening assembly comprises an arc-shaped fixing ring, a connecting rod, an abutting block, an abutting spring, a connecting frame, a fixing block, a left clamping block, a clamping groove, a buffer spring, a right clamping block, an arc-shaped elastic plate and a limiting ring, the connecting rod is arranged at the upper end of the arc-shaped fixing ring, the upper end of the connecting rod is connected with the abutting block, the upper end of the abutting block abuts against the abutting spring, and the connecting frame is arranged on the outer side of the abutting spring. Through the arrangement of an arc-shaped fixing ring, a connecting rod, an abutting block, an abutting spring, a connecting frame, a fixing block, a left clamping blo