Safety limiting device for winch

The utility model discloses a safety limiting device for a winch, which is characterized in that the safety limiting device for the winch comprises an adjusting lead screw, a horizontal guide rail, a limiting pressing piece and a limiting switch, the adjusting lead screw is coaxially arranged in the horizontal guide rail, and one end of the adjusting lead screw is horizontally welded at a center shaft of a steel wire rope reel of the winch; the bottom of the limiting pressing piece is rotationally connected with the adjusting lead screw through a lead screw nut, the limiting pressing piece is clamped and embedded in a long-strip-shaped sliding hole of the horizontal guide rail and can be driven by the adjusting lead screw to move back and forth along the long-strip-shaped sliding hole of the horizontal guide rail, and the limiting switch is fixedly arranged at the end, away from the winch, of the horizontal guide rail. A contact of the limiting switch faces one side of the limiting pressing piece, the limitin