In recent years， Corporate Social Responsibility（CSR）in China has generally improved； meanwhile，the spatial imbalance in the development of CSR emerges nationwide. Different signs suggest that corporate locations shape their social performances significantly. To further explore the mechanism that corporate geo-location affects CSR，this research starts from the spatial perspective，drawing on institution theory and stakeholder theory， and conducts a systematic analysis of the legitimization motivation of CSR. On this basis，combined with relevant case analysis，it is found that the corporate’s geo-location determines the surrounding stakeholders’type，size， and distance， which further affects the type and strength of institutional pressure on CSR and ultimately leads to the spatial imbalance of CSR.