Among 604 maize accessions screened in 2003－2005, 93 were resistance to Curvularia leaf spot and 22 were resistance to asian corn borer. From 2006 to 2009, 836 maize accessions were identified and evaluated for resistance to northern corn leaf blight, Pythium stalk rot, Fusarium ear rot and common smut and some of them were highly resistant and multiplely resistant. Approximately 50﹪ of maize accessions with resistance to northern corn leaf blight race1, 2 and N were screened, respectively. 41.3﹪ of accessions were resistant to Pythium stalk rot, including 264 highly resistant and 81 resistant. 5 and 171 accessions were highly resistant and resistant to Fusarium ear rot, respectively, accounting for 21.1﹪ of total accessions screened. 32.9﹪ of accessions with different resistance to common smut was screened and 261 highly resistant and 14 resistant lines were discovered. Based on the above data, we thought there were relatively abundant maize germplasm with resistance to northern corn leaf blight, Pythium stalk rot and common smut. There were different in resistance level and diversity among maize germplasm from different ecological areas, for instance, there was higher level of resistance and more multiple resistance in germplasm from Heilongjiang Province and Inner Mongolia than that from Sichuan Province. In addition, there was higher level of resistance and more multiple resistance in maize inbred lines than in landraces.