Abstract: Urban renewal initiatives present critical opportunities to address green space scarcity and service inequality in historic urban districts. This study adopts a spatial equity lens to analyze Zoucheng’s old urban area,first identifying underserved zones through GIS-based accessibility modeling and equity assessment of existing parks.A novel framework integrating openability evaluation and appropriateness analysis is proposed to systematically identify candidate sites for small-micro green space conversions. The methodology prioritizes three transformation strategies: boundary permeabilization, efficient green infrastructure integration, and functional diversification.Findings reveal 15 underutilized ancillary green spaces-affiliated with public（A-class）, commercial（B-class）, and residential（R-class） land uses-exhibit high potential for public conversion. This research demonstrates the feasibility and socio-ecological value of repurposing institutional green assets, offering actionable insights for equitable green space planning in urban renewal programs.