This paper describes the key technologies of high-capacity wheel hub spraying automation,which solves many problems such as automatic spraying problems in large-scale production of wheels,positioning of light and small workpieces,conveying parts falling uphill and downward,keeping the workpiece level with the ground,uneven appearance paint film,etc.In addition to greatly improving the automation level of wheel hub manufacturing industry,and meeting the needs of customers'aesthetic individuality.Provide process technology guarantee for enterprises to become high standard auto parts suppliers.