The lapping process of 0.5mm thick 6061 aluminum alloy and 0.5mm thick 304 stainless steel are studied by 1000W-QCW laser. The experiment consists of two parts: single laser welding and Wobble laser welding. The well-formed welds are obtained by adjusting the process parameters. The morphology of weld microstructure and thickness of intermetallic compound (IMC) layer are analyzed by super depth of field optical microscope and scanning electron microscope (SEM).The effective joint width of single laser welding is 213 μm, and the average thickness of IMC layer is 6 μm. The effective weld width of Wobble laser welding is 1 048 μm, and the average thickness of IMC layer is about 2 μm. Then the tensile test of mechanical properties is carried out using tensile testing machine. The maximum tensile strength of single laser welding process is 420 N. The maximum tension of Wobble laser welding is 720 N, and the weld breaks at the interface between aluminum and steel.