In order to solve the problem of deburring and grinding of automobile parts CTF25 pulley shaft of main shaft after finishing machining,the appropriate robot was selected,the special robot floating spindle was used as an example,the special main shaft pulley shaft fixture was designed,and a set of automotive main shaft pulley shaft robot grinding equipment was manufactured.In the equipment,the dual floating spindle and dual tool technology were used to realize automatic tool change during the grinding process,so the burrs existing at the edge of workpiece ballway contour,36 tooth sides and the bottom of the D6 intersecting hole could be removed;by editing the robot polishing path,the robots deburring for the automobile parts CTF25 main shaft pulley shaft were completed with meeting the standard of no burrs by sight,no steps and no tingling when touched by hands,no iron filings in deep holes,so the purpose of reducing costs and improving efficiency could be realized.