The invention provides an application of lucide ganoderma and ginseng medicinal mycoplasm in preparing drugs for treating lung cancer, wherein the lucide ganoderma and ginseng medicinal mycoplasm takes ginseng as a base material and lucide ganoderma as a strain, is obtained after bidirectional solid fermentation, contains ginsenosides Rg1, Rb1, Re, Rg3, Rh1 and various ginsenosides, as well as ginseng polysugar, ganoderan and other ingredients, and can be used for producing drugs for treating lung cancer. According to the invention, the lucide ganoderma and ginseng medicinal mycoplasm is taken as an internal treatment drug for carrying out research on a mice Lewis with lung cancer, is respectively used for the intragastric administration of the mice at the dosages of 0.5g/kg, 1.0k/kg and 2.0g/kg, meanwhile, a blank group, a model group, a cisplatin group, a Shenyi capsule group, a ginseng group, a lucide ganoderma group and a ginseng and lucide ganoderma group are taken for comparison, results show that: the lucide ganoderma and ginseng medicinal mycoplasm has the equivalent treatment effect on lung cancer as cisplatin, Shenyi capsules and other drugs, and is better than the lucide ganoderma, ginseng and the ginseng plus the lucide ganoderma.