Anti-loosening turn buckle

The utility model discloses an anti-loosening turn buckle, which relates to the technical field of turn buckles and comprises a fixing rod, adjusting nuts are inserted into two ends of the fixing rod, adjusting lead screws are inserted into the inner walls of the adjusting nuts, one end of each adjusting lead screw is fixedly connected with a connecting column, inner grooves are formed in two ends of the fixing rod, and the connecting columns are fixedly connected with the inner grooves. And the number of the guide protection blocks is two, limiting grooves are formed in the outer sides of the guide protection blocks at equal intervals and are formed in the bottoms of the two ends of the fixing rod correspondingly, sliding blocks are slidably connected to the inner walls of the sliding grooves, limiting rods are inserted into the middles of the sliding blocks in a penetrating mode, and limiting rod fastening nuts are arranged at the bottoms of the limiting rods in a sleeving mode. The guide protection block l