Abstract: To clarify the tolerance of existing early maturing soybean germplasm to soybean cyst nematode,350 germplasm resources of China and foreign countries were screened and identified for soybean cyst nematode.The investigation results of the field natural nursery method showed that there was a certain difference in the tolerance of soybean germplasm resources to soybean cyst nematode.Among them,no immunized varieties were found,3 soybean germplasms were tolerant,accounting 0.86% of the total evaluated cultivars.The yield components of tolerance varieties were higher than those without SCN under high SCN pressure,the difference was not significant;The yield components of resistant varieties were lower than those without SCN under high SCN pressure,the difference was not significant;However,the yield components of susceptible varieties were lower than those without SCN under high SCN pressure.Three tolerance germplasms,YJ002354,Nordia and Zheng 196,showed no significant difference in yield from resistant varieties,but higher than that of susceptible varieties.