With the increase of agricultural production level,effect of medium trace element becomes more and more obvious.Effect of application medium trace element on quality and yield of soybean cultivars with high oil and high protein from 2001 to 2002 were carried out the research and on the basis rational dosage of medium trace element from 2005 to 2007 were further research in black soil area of central Jilin province.The results showed that rational dosage of ZnSO₄ generally was 1.0 kg.667m^-2 and rational dosage of MnSO₄ generally was 1.0-2.0 kg.667m^-2 whether high oil content or high protein soybean cultivars.Rational dosage of S fertilizer was 3.0 kg.667m^-2 to high oil content soybean cultivars and was 1.0-2.0 kg.667m^-2 to high protein soybean cultivars.