Nitrogen (N),phosphorus (P),potassium (K),calcium (Ca) and magnesium (Mg) are the mineral nutrients that citrus needs in large number. Insufficient fertilization is not conducive to the growth and development of citrus,nor is it conducive to high yield and quality of fruit. However,with the rapid development of the citrus industry,the application of N,P,K fertilizers have gradually changed from insufficient amounts to generally excessive amounts,which has become a key incentive for the low yield and declining quality of citrus in China. In this paper,the relationships between the yield and quality of citrus fruit and usage of fertilizer were analyzed. It was put forward that the quantification and adjustment of N,P,K rations has become the most urgent practical need. The proper usage is both the high yield and the high quality of citrus fruit. The methods of fertilization and usages of fertilizer for citrus recommended at home and abroad are summarized and compared. A method named as the “determining amount of fertilizer by fruit nutrients removal” method for usage of fertilizer based on the amount of nutrients removal per unit fruit yield and target yield of citrus is proposed. It will be of great significance for guiding citrus production in China.