The resistance of 182 pear cultivars to ring rot were evaluated by inoculation during 2009-2010. The results showed the average ratios of infected ring-rot dots of P. pyrifolia（Burn.f.）Nakai P. bretschneideri Rehd., P. ussuriensis Maxim., P. hybrid, P. communis L and P. sinkiangensis Yü were respectively 6.15%、7.20%、7.43%、12.66%、17.00%、18.93%， and the ring-rot resistance among cultivars was different. The ratios of infected ring-rot dots in most cultivars were different under the dissimilar condition. The ring-rot resistance were graded by the average ratios of infected ring-rot dots, 72 cultivars as high resistance, 63 cultivars as resistance, 25 cultivars as moderate resistance, 14 cultivars as susceptive and 8 cultivars as high susceptive.