With the transition to a market-oriented economic system and the transformation of social structure, urban society has undergone significant spatial differentiation, leading to a deepening divide between the rich and the poor. This has caused issues like social exclusion and spatial isolation to become increasingly prominent, which in turn, limit the harmonious and orderly development of cities. As Beijing's goal to become a “world-class harmonious and livable city” accelerates, there has been a growing focus on ensuring social justice satisfaction for residents in low-income communities. This focus has translated into more attention being paid to spatial equity in residents' living environments. Employing a mixed-methods approach with multi-level regressions to understand the nuanced interplay between urban geography and social equity, where depend variable was subjective questionary from low-income communities in Beijing (2017), the independent variables were geographical factors. Using research data from typical low-income communities in Beijing (2017), our study integrated theories from geography and sociology to examine the spatial equity of the living environment. We then empirically analyzed the impact of geographical environment and objective conditions on residents' perception of social equity in low-income communities. Our findings indicate that there are significant differences in the level of social justice perception among residents across different types of communities. The upscale community with better community environment is not consistent with the evaluation of higher perceived justice. Furthermore, service facilities, employment accessibility, and built environment all influence individual satisfaction with social justice to varying degrees. There is also a moderating effect of living environment satisfaction on social justice perception in low-income communities, with residents' socioeconomic attributes influencing their level of social justice satisfaction. This research contributes to the broader understanding of spatial equity in urban development, highlighting the pivotal role of geographical factors in shaping perceptions of social justice. These insights are crucial for policymakers and urban planners striving for more equitable urban development in rapidly growing cities.