Abstract: This invention provides a method for producing a polishing bar made of valve steel 53Cr21Mn9Ni4N. The process flow is as below: electric furnace smelting?outside-the-furnace refining?continuous casting?heating?high-speed wire rolling?heat treatment (off-line/online)?straightening?polishing?inspection?storage. The production method of the invention adopts a casting method of continuous casting to overcome the poor high-temperature plasticity and the great deformation resistance of 53Cr21Mn9Ni4N which leads to a difficulty in continuous casting. The continuous casting is directly carried out on casting billets for rolling, which greatly reduces the material loss and energy consumption of this step, and improves the yield of the billets. The high-speed wire precision rolling technology is directly used on the continuous casting billets to improve the production efficiency, and greatly improve the size precision control of rolled and finished wire rods.