The nutrition of Yantai Red Fuji apple leaves was diagonsed in response to the unreasonable fertilization method of apple ochards in Yantai which caused the nutritional imbalance of trees and the slow growth of fruit and the uneven quality of apples，and thus promoting the balance fertilization of apple ochards. Based on DRIS(diagnosis and recommendation integrated system)，the N，P and K of leaves are used for nutritional analysis. Through DRIS graphic method and index method，the required fertilizer order of each nutrient element in apple leaves and NII(nutrient imbalance index)are obtained. The results show that the urgency of fertilizer requirement for the high-yield orchards is N>K>P and the average NII is 21.93；the urgency of fertilizer requirement for the low-yield orchards was K>P>N and the average NII is 57.28. The nutrition of low yield orchards is seriously unbalanced. The DRIS critical classification standard shows that the equilibrium concentration of the three elements are respectively within the ranges of 23.39～26.81，2.13～2.37，8.43～12.26 g·kg-1. The urgency ranking of fertilizer requirements and the DRIS critical classification standard can be used as the basis for balanced fertilization of Yantai Red Fuji apple.