The invention relates to an anti-drop structure for a regulating valve bushing, which comprises a valve body, a valve seat, a valve cover, a valve rod, a valve core and a bushing, wherein the valve seat is fixed in the valve body, the valve cover is fixed on the valve body, the valve rod is spliced in the valve cover in a sliding and sealing manner, the valve core is fixed at the bottom end part of the valve rod, an end face of the bushing pushes against limiting steps, a limiting outer conical surface is arranged at the outer side edge of the other end part of the bushing, and the other end part of the bushing is contacted with a limiting inner conical surface of an extruding flange. With the adoption of the structure, tools such as a drilling bit and a screw tap are not required during the assembly course, as the drilling bit and the screw tap are easy to break when in use to cause work injuries, dangerous processing procedures are reduced, the requirement for the dimensional tolerances of the bushing and a matching surface of the bushing is lowered, the assembly is faster and more reliable, the assembly efficiency is improved, the number of the location steps is increased, the drop of the bushing is effectively prevented, the reliability of a product is improved, the service life of the product is prolonged, and the significant economic benefit is achieved.