The formal process of new types of carbodies loaded online specifically and the continuousoptimization of automatic robot program trajectory and manual brush points reduction were introduced.From VMT system,the position of the commissioning carbody in world coordinate were calculatedl,then throughmathematic transform,the zero position of the carbody in world coordinate were got.From the optimization ofthe picture model and storage in VMT system,the compensation value between commissioning carbody andstandard carbody in world coordinate by calculation were got.Using special software to edit offline programand teach pendant to optimize program online,the robot application parameter was set and robot sprayautomatically was made at last.'The location and amount of manual brush points to balance the work load ofmanual operators were reduced.The whole project was done by the engineers of production andmaintenance,saved ¥1500000 cost of the third party.