The invention discloses a CNT (carbon nano tube)-gold and copper alloy composite material. The CNT-gold and copper alloy composite material comprises CNTs and gold and copper alloy nanoparticles on the surface layers, the gold and copper alloy layer is prepared from components in percentage by weight as follows: 5wt%-10wt% of CNTs, 15wt%-65wt% of gold and 25wt%-75wt% of copper. By means of loadingof the CNTs, interaction between gold-copper and carriers can be improved, and sintering resistance of the gold and copper nanoparticles is greatly improved; by means of high specific surface area ofthe CNTs and mutual support structure of nano tubes in a catalyst, the gold and copper nanoparticles are separated and dispersed, distance between the gold and copper nanoparticles is increased, a certain effect on the sintering resistance of the catalyst is realized, and reaction stability of the catalyst is improved; the gold and copper nanoparticles with different grain sizes can be obtained by adjusting technological parameters, are high in purity and wide in particle size range and have controllable grain size, the obtained gold and copper alloy nanoparticles have good interface bondingwith the CNTs, and catalytic performance of the alloy is better than that of a traditional gold and copper alloy.