568 Mono-spore strains were separated from 732 samples of blast collected from each paddy rice production fields in Jilin province from 2002 to 2007.7 groups with 39 physiological races were identified by comparing with China verified strains,among which ZE and ZG groups were dominant groups,ZD and ZF were secondary groups,ZE1 and ZG1 were dominant physiological races,ZF1 and ZD1 were secondary physiological races.The results showed that japonica physiological race was dominant of blast in Jilin province,and dominant race varied with years and locations.