Crabapple leaves were rich in biological activity components and nutrients, however, most of them were discarded in the field. In order to improve the usage of the crabapples leaves, the present study attempt to characterize the main nutraceutical compounds, mineral elements and antioxidant activities of leaves in eight crabapple cultivars. The results showed that the leaves of crabapples not only contained abundant soluble sugar, soluble protein, amino acid and mineral elements, but also had strong antioxidant activity, however, there were significantly different between different cultivars. For nutraceutical compounds of leaves, the contents of soluble sugar in the highest groups of ‘Shibiao 1', ‘Winter red' and Malus. micromalus were 57.50% higher than those in the lowest groups of M. halliana, ‘Radiant' and ‘Red splendor'. The soluble protein content of ‘Shibiao 1' with the highest content was 84.34% higher than that of ‘Radiant' which with the lowest. Moreover, the content of amino acids ranged from 57.13 mg/g to 88.78 mg/g. For the mineral element of eight crabapple cultivars, the content of Ca was the highest in major elements, and the content of Fe was the highest in minor elements. For phenolic compounds, the content of flavonoids and total phenols was the highest in ‘Winter red', and the contents ranged from 37.46 to 58.27 mg/g in flavonoids, ranged from 70.66 to 133.49 mg/g in total phenols contents in leaves of the eight crabapple cultivars. All crabapple cultivars leaves displayed high antioxidant activity. ‘Winter red' and M. halliana had the strongest DPPH and ABTS+ radical-scavenging activity among the tested leaves, which were 92.79% and 91.75%, respectively. Based on the principal component analysis of the 12 indexes of eight crabapple cultivars, the comprehensive scores of nutritional composition and antioxidant activity were obtained as follows: Malus. halliana<Malus. micromalus<‘Sweet tea'<‘Radiant'<‘Shibiao 1'<‘Red splendor'<‘Kelsy'<‘Winter red'. Based on these results, the leaves of crabapples had good utilization value and strong potential for development in the future.
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