Abstract: The aim of this study is to identify the resistance of rice varieties from different ecological regions to rice blast, and to find an incidence index standard for evaluating rice blast. 72 rice varieties (lines) were used as materials for resistance identification. The plastic greenhouse artificial spray and natural induction of diseased plants’samples were combined to identify the disease. There were 17 rice varieties with strong resistance to blast disease in 72 rice varieties or lines tested, and their leaf blast disease index was 0-2. The other varieties or lines had more severe disease incidence, and the leaf blast disease index was more than 30, and some even died. The varieties with no disease in the seedling stage were also possible to be susceptible to panicle blast in the mature period. After transplanted to the field, the varieties with common type of leaf blast could be reversed to having no disease signs. The mortality of varieties with acute type of leaf blast was above 90% at reviving stage. It indicated that there was no significant correlation among seedling blast, leaf blast and panicle neck blast. The acute type leaf blast could be used as the incidence index standard for identifying the rice blast at seedling stage.