A laser welding method for red copper and brass comprises the following steps of (1) cleaning red copper to be welded and brass to be welded; (2) forming a welding opening in a welding portion of the brass to be welded; (3) fixedly connecting the brass to be welded and the red copper to be welded at the welding opening; (4) coating a layer of intermediate materials on the welding opening of the brass by using a laser cladding method; (5) performing laser welding on the red copper and the brass on the portion of the intermediate materials; and (6) naturally cooling down the red copper and the brass so as to finish laser welding of the red copper and the brass. The laser welding method for the red copper and the brass has the advantages of the brass and red copper connection efficiency is high, and the connection quality is also high.