The utility model discloses an automatic locking steel wire rope which comprises a steel wire rope body, a groove is formed in one side of the surface of the steel wire rope body, a rack is fixedly installed on one side of the interior of the groove, a fixing sleeve is fixedly installed at one end of the steel wire rope body, and an installation block is fixedly installed on one side of the surface of the fixing sleeve. An inserting hole is formed in one side of the surface of the mounting block, one end of the steel wire rope is movably inserted into the inserting hole in a penetrating mode, when the double-thread screw rotates, a movable screw sleeve on the surface of the double-thread screw moves on the surface of the double-thread screw in the opposite direction, and the movable screw sleeve drives a movable plate to move in a mounting groove through a movable supporting rod; the two ends of the moving plate move along the sliding rails, movable connection between the moving plate and the mounting groove is enhanced, the moving range of the moving plate is limited, and along with movement of the moving plate, the ratchet wheel on one side of the moving plate is separated from the rack, so that the steel wire rope can be pulled out from the interior of the mounting block, and separation of the steel wire rope is facilitated.