The purpose of this paper is to study the planning and design of campus plant communities from the perspective of vegetation carbon sink capacity. During the research period, based on literature review and material investigation, the quantitative calculation of the carbon sink capacity of the vegetation of the campus of the case study university was carried out using the i-Tree model, and the shortcomings of the carbon sink level of the campus vegetation community were pointed out based on the calculation results. Subsequently, with the goal of improving the carbon sink capacity, the park is oriented to the planning and design of vegetation communities, and the feasibility of the program is demonstrated with the support of the data on the level of carbon sink capacity after the implementation of the program. It is hoped that this paper can provide technical reference for the managers of universities and urban landscape departments in China, and actively promote the optimization of vegetation communities, enhance the carbon sink capacity, and promote the full implementation of the goal of sustainable development.