Abstract: Social capital participation is key to overcoming the funding and operational challenges of region-wide comprehensive land consolidation. However, how planning and design can respond to and balance the diverse demands of social capital to ensure comprehensive project benefits remains insufficiently explored. To address this gap, this paper constructs a ‘demands-strategies' response analysis framework. Taking the region-wide comprehensive land consolidation project in Xiaohai Town, Dafeng District, Yancheng City, Jiangsu Province as a case study, it systematically examines the core demands of social capital across four dimensions: economic feasibility, risk controllability, strategic synergy, and capability accumulation. A corresponding design strategy system is then proposed, encompassing systematic collaborative design, the balance of economic and social benefits, dynamic government-enterprise negotiation, full-process fund control, and full life-cycle integration. This study not only offers actionable implementation pathways for comparable projects, but also theoretically demonstrates the role transformation and value elevation of planning and design in guiding social capital toward public-interest projects, providing a theoretical reference and methodological support for advancing the modernization of territorial spatial governance.