The purpose was to provide theoretical evidence for scientific fertilization and nutrient diagnosis. The experiment was conducted with the ‘mugua’ almond-apricot. ICP-OES was selected to determine the content of the mineral nutrition (Ca, P, K, Mg, Fe, Zn, Cu, Mn, Al) in leaves of ‘mugua’ almond-apricot. The results were as follows: the development of content of Ca&Mg, Cu&Zn&P, Fe&Al had the similar trends, and K, Mn showed different developing tendency between each other and from others. The correlation analysis showed that there was a strong correlation in different elements. The results also indicated that the appropriate period of analyzing the standards of nutrition diagnosis of the leaves was about mid-July.