The invention discloses a silver-ruthenium bimetal doped graphene catalyst and its preparation method and application. The catalyst includes a graphene carrier, and the graphene carrier is loaded with silver and ruthenium nanoparticles, and the mass ratio of silver and ruthenium nanoparticles is 0.5 ~1: 0.6~1.1, the diameter of silver and ruthenium nanoparticles is 100~800nm. The preparation method of this catalyst comprises the following steps: (1) prepare graphene; (2) make AgBF 4 with RuCl 3 Dissolving in ethylene glycol, adding graphene, and reacting under hydrothermal conditions; (3) cooling, centrifuging, washing, and vacuum drying to obtain the product; (4) roasting. The catalyst is used as a catalyst in the synthesis process of bisphenol F or 1-phenyl-3-p-nitrophenyl-acetone. When the catalyst is used in the synthesis of bisphenol F, it has excellent catalytic performance, significantly improves the yield of bisphenol F, and the side reaction products are effectively reduced; when used in the synthesis of 1-phenyl-3-p-nitrophenyl-acetone It has excellent catalytic performance, the product chemical selectivity is 100%, the yield is greater than 90%, and it can be recycled and reused.