Abstract: An experiment on the effects of microbial fertilizer on the quality of 8-year Dangshan crisp pear show a remarkable decrease of N contents and an marked increase in P,Ca,Mg,Zn,Mn,K,Fe,B contents in Dangshan crisp pear leaves when treated with microbial fertilizer. Reasonable application of microbial fertilizer enhances yield and increases sugar and Vc contents,ratio of sugar to acid; and improves fruits quality. It also improves storing quality. Under the experimental conditions,the optimum application amount of microbial fertilizer is 1.0kg per tree.