With the national strategy of "Substituting aluminum for copper" in industry is proposed,aluminum/copper joining has become a hotspot in the field of welding. The current research situation of aluminum/copper fusion brazing technology at home and abroad are summarized,the existing problems of this technology are expound,and the aspects still need to be improved and the problems need to be solved in the future research are put forward. Based on above research,the basic scientific problems such as the aluminum/copper fusion welding technology are deeply understood and further clarified,which can provide reliable technical support and scientific theoretical support for industrial application.