Abstract: 【Aim】 This study aims to understand the effects of different land use types on the number of individuals and dominant group of Ichneumonidae and their dynamic change. 【Methods】 From October 2018 to September 2019, the individuals of Ichneumonidae were collected in 2 300 m area in the eastern slope of Cangshan Mountain of Dali Bai Autonomous Prefecture, Yunnan, southwestern China using Malaise trap, and the differences in the biomass, subfamily number, community structure and subfamily diversity of Ichneumonidae between the two habitats were analyzed. 【Results】A total of 2 259 individuals of Ichneumonidae belonging to 23 subfamilies were collected in natural forest and tea garden from the eastern slope of Cangshan Mountain, Dali, Yunnan from October 2018 to September 2019， including 1 551 individuals belonging to 22 subfamilies in natural forest, and 708 individuals belonging to 21 subfamilies in tea garden. The monthly number of individuals of Ichneumonidae in natural forest was higher than that in tea garden, and there was no significant difference in the monthly number of subfamilies of Ichneumonidae between the two habitats. The fluctuation of monthly number of subfamilies of Ichneumonidae in natural forest showed two peaks in June and December, respectively, while that in tea garden showed no peak. The community composition exhibited significant difference between the two habitats. The unique dominant subfamily in natural forest was Anomaloninae and that in tea garden was Phygadeuoninae. Campopleginae and Orthocentrinae were the shared dominant subfamilies in the two habitats. There was no significant difference in the monthly subfamily diversity index and richness of Ichneumonidae between natural forest and tea garden. 【Conclusion】 Therefore, the total number of individuals of Ichneumonidae in tea garden in the low altitude area in Cangshan Mountain reduces, and the community structure, dominant group and annual dynamics of individual number in this habitat change as compared to those in natural forest. In order to protect the biological control insects like Ichneumonidae, it is recommended to protect the original vegetation and land use types.

Key words: Ichneumonidae, community structure, subfamily diversity, dynamic monitoring, habitat deterioration, Cangshan Mountain