Objective: To evaluate the α-glucosidase inhibitory activity of the flowers and leaves of Malus halliana Koehne. Method: By used α-glucosidase inhibitory model in vitro and with acarbose as positive control

the α-glucosidase inhibitory activity of the flowers and leaves of M. halliana were evaluated. Result: Different extracts from the flowers and leaves of M. halliana all had inhibitory activity of α-glucosidase

among which leaves of M. halliana 70% ethanol extract (IC50=69.68 mg·L-1) had the highest inhibitory activity of α-glucosidase

it was far higher than that of the positive control acarbose (IC50=1 213.38 mg·L-1). 70% Ethanol extract

petroleum ether extract and ethyl acetate extract of leaves of M. halliana were higher than that of corresponding extract of flowers of M. halliana

while n-butanol extract of leaves was lower than that of n-butanol extract of flowers

and they were all higher than that of acarbose. In addition

the concentration of all extracts showed positive correlation with inhibitory activity

and also showed a certain degree of concentration dependence. Conclusion: Different extracts from the flowers and leaves of M. halliana all had inhibitory activity of α-glucosidase

but different extracts of the inhibition rate had certain difference.