Abstract: With the development of urbanization, the outdoor thermal environment is getting worse and worse. A good outdoor thermal environment can enhance the well-being of urban residents. In order to study the impact of vertical greening on the outdoor thermal environment of residential areas, this paper takes a community in Zhuzhou City as an example, and uses ENVI-met software to simulate the relevant parameters of the outdoor thermal environment in the site. Five different vertical greening facades are set up to study their effects on the outdoor thermal environment. The results show that the layout position of vertical greening and the wind direction of the site will affect the area of influence on the outdoor thermal environment. The cooling and humidifying effects of vertical planting will be superimposed along the wind direction. The effect of different vertical greening facades on outdoor thermal environment is as follows: east-west-south composite facade > south facade > east-west composite facade > east facade > west facade. In the future, when renovating the vertical green walls of residential areas, only installing vertical greening on the south facade can achieve a balance between environmental benefits and construction costs.