Abstract: Rice blast is a kind of epiphyte disease by Magnaporthe grisea. Rice blast is one of rice main disease, which threaten badly rice production. It not only decreased rice yield by 10-30%, but also debase quality of rice. In this thesis, analyzed in detail study advances of rice blast, summarized countermeasures of prevention and cure rice blast. On the basis of that, put forward synthetical countermeasure of prevention and cure completely rice blast. At first, plant rice variety with high rice blast resistance; then, use the mixture cultivated technology of rice diversity and rice blast control in rice; finally, adopt prevention and cure rice blast by chemical pesticide.