Presently,the casting cleaning in our country mainly depends on manual polishing,which brings some problems such as low efficiency and poor product consistency.Therefore it’s very important to research and develop automatic equipment for casting cleaning.To achieve fully automatic polishing for brake stents,the hardware system and control software based on Beckhoff embedded control system were designed and developed after analyzing its polishing process.The system has run six months stably,by which not only the pace of production is accelerated and the polishing cost is reduced,but also hardware condition is provided for equipment connection.