Shockproof anchor bolt

The utility model discloses a shockproof anchor bolt which comprises an inner screw rod and a cutting pipe arranged on the periphery of the inner screw rod in a sleeved mode, an expansion conical piece is arranged at one end of the inner screw rod, and threads are arranged on the periphery of one part, close to the other end, of the inner screw rod to form an outer thread section. The part, positioned between the expansion conical piece and the external thread section, of the inner screw rod is a thread-free section; a plurality of longitudinal cracks are formed in the inner end of the cuttingpipe, and an expansion sheet is formed at the part between every two adjacent cracks; and threads are arranged on the inner side face of the outer end of the cutting pipe, and when the cutting pipe is arranged on the inner screw rod in a sleeving mode, the threads of the cutting pipe are connected with the outer thread section of the inner screw rod in a meshed mode. The utility model has the advantages of simple structu