全域土地综合整治是优化国土空间格局、促进县域经济发展的重要政策工具。本文基于2012—2022年中国2076个县域的非平衡面板数据，以多期双重差分法识别该政策对县域经济发展的影响及其作用机制。研究发现，全域土地综合整治能显著促进县域经济发展，该结论经多重稳健性检验后仍成立。机制检验结果表明，全域土地综合整治可以盘活存量土地，吸引政府与社会资本，提高土地集约度与资本利用效率，从扩大要素供给规模与提升要素利用效率双重维度驱动县域经济发展。异质性分析结果显示，该政策效应在人口密度低及中西部县域更突出，契合这些地区对土地集约利用和资本注入的需求。

Comprehensive land consolidation is an important policy tool for optimizing the territorial space pattern and promoting county-level economic development. Based on unbalanced panel data of 2076 counties in China from 2012 to 2022, the impact of this policy on county economic development and its underlying mechanisms have been analyzed by using the multi-period difference-in-differences method. The study finds that comprehensive land consolidation significantly promotes county-level economic development, and this conclusion remains valid after a series of robustness tests. The results of mechanism tests indicate that comprehensive land consolidation can revitalize existing land, attract government and social capital, improve land intensification and capital utilization efficiency, and drive county economic development from the dual dimensions of expanding factor supply scale and improving factor utilization efficiency. The heterogeneity analysis reveals that the policy effects are more prominent in counties with low population density and in the central and western regions, aligning with these areas’ higher demand for intensive land use and capital injection.

F301.23

国家社会科学基金重大项目（23&ZD112）；广东省哲学社会科学规划2025年度乡村振兴定向委托项目（GD25ZX03）