The point cloud data of existing paint workshop of Brilliance Auto was collected by the 3D laser scanner and imported into the PDPS to establish a digital twin factory consistent with the actual structure,size and position of the painting workshop line.Taking the working area of the electrophoresis tank,drying furnace and strong cooling room as an example,the passing ability of new car model in the painting workshop is analyzed by dynamic simulation.The results of trial production verify that this application can not only improve the grasp and accuracy of the new model commissioning,but also greatly reduce the retrofit cost and time.