建筑业数字化低碳转型与高质量发展势在必行，考虑碳交易政策和工业互联网平台下建筑机械闭环供应链的行业应用，通过构建建筑机械租赁闭环供应链分散式和集中式决策模型，并设计租赁补偿-联合减排契约协调供应链。结合数值算例分析为供应链的最优策略提供更直观的管理启示。结果表明：租赁补偿-联合减排契约可以减少分散决策下供应链与集中决策利润的差距，当减排比例与补偿在一定范围时，联合契约可以实现供应链成员利润的Pareto改进。当再制品偏好系数、产品维护敏感系数和碳交易价格提高时，会增加再造品需求量，减少供应链碳排放量。

The digital low-carbon transformation and high-quality development of the construction industry are regarded as inevitable. The industrial application of the closed-loop supply chain of construction machinery was considered under the carbon trading policy and the industrial Internet platform. Decentralized and centralized decision-making models of the closed-loop supply chain of construction machinery leasing were constructed, and a leasing compensation-joint emission reduction contract was designed to coordinate the supply chain. Combined with numerical example analysis, more intuitive management enlightenment was provided for the optimal strategy of the supply chain. The results indicate that the rent compensation-joint emission reduction contract can be used to reduce the gap between the supply chain profit under decentralized decision-making and centralized decision-making. When the emission reduction ratio and compensation are within a specified range, the joint contract is shown to achieve Pareto improvement in the profit of supply chain members. It is also demonstrated that when the preference coefficient of remanufactured products, the sensitivity coefficient of product maintenance, and the price of carbon trading are increased, the demand for remanufactured products is enhanced, and the carbon emissions of the supply chain are reduced.