Multiple panel sheet like three,four even five sheets spot welding process is usually exist in white car body frame,when we use regular parameter to weld,it is hard to achieve the good spot welded joints and defects such as splash,spur and through holes comes out during welding,thus lead to wasting cost and time in production.While the hot forming sheets is widely used by the motor factory,non-splash,well forming joint is hardly achieved by the single pulse parameter process.For such spot welded joints of multilayer plates containing thermoformed plates,spot welding controllers based on BOS6000 software are used for multi-pulse spot welding process parameter tests.By metallographical,BOS6000 UIR Curve,production line feedback,the welding joints with reliable welding spots and low splash rate can be obtained by using the multi-pulse spot welding process.