Abstract: In the paper,the operation technology of electron beam evaporation plating Aluminium-Chromium alloy coating is studied The optimum technology is obtained by discussing the influence of votage,current on auter appearance,adhesion inner Stress.The ingredients of coation and evaporation materials are analyzed,the results show that the chromium contents of coating are very different from that of evaporation materials;In the end,the corrosion-resistance of the coating consisting of different chromium contents is investigated.