Abstract: The continuous deterioration of urban thermal environment threatens human physical and mental health. The evaluation of thermal comfort can effectively assess the situation of urban thermal environment. In order to improve urban thermal microenvironment, we should rationally arrange planting mode and consider the interaction between green landscape and buildings. In this study, we explored the impacts of different planting modes on the improvement effect of urban microenvironment thermal comfort. The microclimate numerical simulation software ENVI-met was used for modeling simulation and spatial-temporal feature analysis based on eight vegetation planting mode models through field investigation of vegetation conditions and architectural patterns. The results showed that the effects of vegetation on thermal comfort presented a bell-shaped curve within a day, with the most prominent  improvement effect presenting at 11:00 and 16:00. The improvement effect of trees on thermal comfort was stronger than that of grass and shrub. The dense arrangement of trees and the planting mode of tree-shrub-grass had a stronger effect on improving thermal comfort than other planting modes.

Key words: urban microenvironment, thermal comfort, planting mode, ENVI-met.