A total of 3995 maize germplasm were identified for resistance to Sugarcane Mosaic Virus-Maize Dwarf strain B(SCMV-MDB) by frinky inoculation.Seventy-three good resistant inbred lines and 80 abundant resistant hybrids were screened by repeated identification.The resistance of maize heterotic groups were significant different.Most of germplasm of improved Reid , Lancaster and Ludahonggu groups were susceptible.Most of the Tangsipingtou and selected lines from Pioneer hybrids were resistant.Flint maize and dent maize and semident maize were resistant. Only a few germplasm were resistant in waxy corn. No resistant germplasm was found in sweet maize and popcorn.