Magnaporthe grisea is the most epidemic and destructive pathogen of rice worldwide.And it is also the principal model organism for research on interaction between fungal pathogen and host plants.Scientists at home and abroad have roundly done research into rice blast fungus.It is reviewed and summarized the research progress on virulence specialization of rice blast fungus,virulence,relationship between pathogenicity and genetic lineage,functional gene and the genome of the rice blast fungus.