Differences-in-Differences (DID) and Stochastic Frontier Analysis (SFA) are adopted to investigate the realistic and potential effects of construction land reduction on sustainable economic development. It is found that in the short term, construction land reduction will have negative effects on the labor market of the regional economy. While significantly reducing pollutant emission intensity, this reduction will lead to factor mismatch and idleness and then inhibit construction land use efficiency, which will inhibit the Porter effect; the reduction quota will not meet the condition of cross-regional flow. Construction land reduction will produce significant short-term economic benefits when the reduction scale is controlled at 1.453∼4.403 ha per year. If local governments pay more attention to the long-term benefits, the scale of reduction can be slightly increased on this basis. The greater the financial pressure is, the smaller the scale of the reduction, and it will be easy to make the local financial network fall into the Matthew effect trap. However, financial subsidies from both the district and municipality level can effectively alleviate this problem. In the long term, construction land reduction can significantly improve construction land use efficiency and generate the Porter effect. In addition, the cross-regional flow of the reduction quota can be feasible, which can significantly increase the potential economic dividends for the entire region. Although construction land reduction will generate short-term difficulties, it can significantly promote sustainable economic development in the long term, resulting in a new model of sustainable land use promoting economic development and environmental sustainability.

采用差异差异（DID）和随机边界分析（SFA）来研究减少建设用地对可持续经济发展的现实和潜在影响。发现在短期内，建设用地的减少将对区域经济的劳动力市场产生负面影响。在大大降低污染物排放强度的同时，这种减少将导致要素失配和闲置，进而抑制建设用地的利用效率，从而抑制波特效应；削减额度将不满足跨地区流动的条件。当减少土地的规模控制在每年1.453〜4.403公顷时，减少建设用地将产生重大的短期经济效益。如果地方政府更加重视长期利益，在此基础上，减少的规模可以略微增加。资金压力越大，减少的规模越小，并且很容易使当地的金融网络陷入马修效应陷阱。但是，区和市两级的财政补贴都可以有效地缓解这一问题。从长远来看，减少建设用地可以大大提高建设用地的利用效率，并产生波特效应。此外，减少配额的跨区域流动是可行的，这可以显着增加整个区域的潜在经济红利。尽管减少建设用地会带来短期困难，但从长远来看，它可以大大促进经济的可持续发展，