以科学性、代表性、可操作性和系统性为原则,从树干、树枝、树叶、根系、病虫害和立地环境角度选取了树干倾斜度、树干损伤程度等11个指标,对北京香山、庆王坟、明永陵、二环和地坛等5个点358株古树进行了健康评价。结果表明:这些古树以亚健康水平为主,比例达60.89%;其次是健康水平的古树,比例为33.80%;5.31%为不健康水平,没有濒死水平的古树。从地点分布看,地坛9株古树均为健康,庆王坟77.36%为健康,香山、二环和明永陵古树以亚健康为主,其比例分别为87.50%,81.25%和71.96%。 Based on the principle of scientificity, representativeness, maneuverability and systematicness, eleven indicators such as trunk inclination, degree of trunk damage and so on were selected from the perspectives of trunk, branches, leaves, roots, pests and diseases, Graves, Ming Yongling, Second Ring and Earth altar 5 points 358 old trees for health evaluation. The results showed that these ancient trees were mainly sub-healthy, accounting for 60.89% of the total, followed by healthy trees with the proportion of 33.80%. 5.31% were unhealthy and did not have dying trees. According to the distribution of sites, all the nine ancient trees in Ditan were healthy. 77.36% of Qingwangfen was healthy, while the ancient trees in Xiangshan, Second Ring and Mingyongling were sub-healthy with proportions of 87.50%, 81.25% and 71.96% respectively.