Landscape garden planning, as an important part of coastal regional construction, has attracted widespread attention. In coastal landscape planning, there are many problems due to the different level of regional economic development, the unbalanced capacity of landscape planning and the unscientific guiding ideology. Therefore, a community planning of Sabina vulgaris based on ecological priority in coastal area is proposed. According to the environmental characteristics and current situation of coastal area, the ecological regionalization and index system are completed by using GIS technology, and the ecological characteristics of Sabina vulgaris community are analyzed. According to the landscape index method and the ecological risk of coastal area, the landscape garden and the effective planning of Sabina vulgaris community are determined. The results show that the area change of Sabina vulgaris community and the ecological process of community center and edge landscape prove that Sabina vulgaris community has good ecological benefits for the inner environment of landscape gardens based on coastal ecological priority.