Abstract: In order to make clear the changes and accumulation mechanism of mineral nutrition in developing apple leaves, the leaves of ‘Wangshanhong’ and other 2 apple cultivars were used as experimental materials for the measurement, the author analyzed changes in the contents of mineral nutrients during leaf development and their correlation. The results showed that during leaf development, the levels of N, P and B exhibited a decreased-increased-decreased trend, K and Mn showed an increased-decreased-increased trend, Ca, Mg, Zn and Cu showed an increased-decreased trend, while the levels of Fe generally decreased during leaf development. Correlation analysis of the changes in mineral nutrients contents during leaf development indicated that the changes between N and P levels were highly significantly positive correlated, P and Mn, Ca and Cu levels were significantly positive correlated, whereas changes between the levels of Mn and B were extremely and significantly negative correlated, K and Mg, Ca and Fe were significantly negative correlated. These results indicated that the accumulation of the ten mineral nutrients content in the levels were different, some mineral nutrients acted antagonism or synergism when theirs were absorbed by the apple tree.