Sliding rail with self-locking structure

The utility model discloses a slide rail with a self-locking structure, which relates to the slide rail field, and comprises a fixed rail and a movable rail, the movable rail is movably inserted in the fixed rail, an adjusting screw rod is movably inserted in a mounting groove, the surface of the adjusting screw rod is sleeved with a movable screw block, the movable screw block is in threaded connection with the adjusting screw rod, and the movable screw block is in threaded connection with the fixed rail. A movable block is movably inserted into the mounting groove in a penetrating mode, the movable rail moves in the fixed rail, and when clamping holes in the two sides of the movable rail move to the positions of a first movable groove and a second movable groove, clamping balls pop out of the first movable groove and the second movable groove under the action of clamping springs and are inserted into the clamping holes, and the movable rail can be limited; due to the fact that the clamping balls are semicir