Taking Heping District of Shenyang City as an example, taking the community as the basic spatial unit, this paper selects the relevant evaluation indexes of "demand side" and "supply side", evaluates the matching relationship between supply and demand and the degree of coupling and coordinated development of park green space according to the calculation formulas of each index, and calculates the Lorenz curve and Gini coefficient of permanent population group, children and elderly group to explore the allocation differences of park green space resources among different groups. The results show that there is a mismatch between supply and demand in most communities in Heping District, and the elderly and children are far from the absolute equality curve. According to the characteristics of different communities, this paper further puts forward the optimization strategy of park green space around the governance angles of "point", "line" and "area", which provides a new perspective for the study of fine layout of urban green space planning.