Abstract: The pathogenic plants collected in the field and 48 germplasm resources of common bean were used as test materials, and the effects of pathogenic pathogen Rhizoctonia solani on the growth of common bean were studied by the combination of molecular biology and morphology, indoor artificial inoculation of pathogenic bacteria to screen resistance resources and the toxicity of fungicides, in order to screen resistance resources and effective control methods of common bean blight in Heilongjiang region.The results showed that the pathogen was Rhizoctonia solani.In the resistance screening of 48 common bean germplasm resources, two moderately resistant germplasm resources were found, namely ‘Taiyou No.18 Jade Bean’ and ‘Zao Wujin Jie bean’.All of the 14 fungicides had inhibitory effects on the strain, among which the EC₅₀ values of trifloxystrobin tebuconazole(0.03 mg·L^-1),procymidone(0.4 mg·L^-1),kresoxim-methyl boscalid(10.6 mg·L^-1) and tebuconazole azoxystrobin(4.8 mg·L^-1) were relatively small, and the antibacterial effect was better.