Abstract: Ustilago crameri koern in our province is one of the major diseases in recent years, there are signs of increase. The test adopted by the different varieties of resistance and cross-species around the vaccination, the identification of pathogenic changes in the analysis of Ustilago crameri koern division race. The results show that are at least three types of physiological race, that are, Xinzhou and Huguan low pathogenic two types , and another one highly pathogenic. Most of the major diseases by this rice. It is our province millet production potential threat.