Equitable distribution of urban park green space benefits public health and improves quality of life. From the perspective of landscape justice, this study establishes a subjective and objective comprehensive fairness evaluation method and analyzes the fairness of the spatial distribution of park green space in the Daxing part of Yizhuang New Town, Beijing and its relationship with the economic level of residents. The results show that: (1) the green space in the Daxing part of Yizhuang New Town is concentrated in the town center and distributed more sparsely in surrounding areas; (2) urban park green space is not equitable in quantity, area, disaster prevention and avoidance, or accessibility; (3) high-grade apartment complexes have higher quality of services than low-grade apartment complexes, and the number of parks, per capita park area, disaster prevention and avoidance, and park accessibility are all higher for high-grade than for low-grade apartment complexes. Medium-grade apartment complexes have a high level of green space services, and the number of parks, total area, and accessibility are 1.06, 2.58, and 1.13 times higher than those of high-grade apartment complexes, respectively. Conversely, disaster prevention and avoidance and park area per capita of medium-grade apartment complexes are lower than in high-grade apartment complexes, at 0.81 and 0.12 times, respectively. This study provides a new perspective for exploring society and landscape equity and concludes with suggestions for improving park green space public services.