[Objective] The carbon emissions in the process of land consolidation projects was scientifically measured, in order to provide support for the implementation of low-carbon land use and the realization of carbon peaking and carbon neutralization goals.[Methods] The carbon emission mechanism in the construction process of land consolidation project was analyzed according to specification of PAS2050 in the field of international architecture. Based on the carbon emission coefficient method, the budget quota of land consolidation project was converted into carbon emission quota, and the total carbon emission of the land consolidation project was measured and calculated according to the idea of construction project budget.[Results] ① The carbon emission quota of land consolidation project was based on the relevant budget quota given in the budget quota of land development and consolidation project. The carbon emission coefficient method was used to calculate the carbon emission of a certain amount of manpower, materials and machinery contained in each budget quota, and then convert it into carbon emission quota, so as to finish the calculation of the total carbon emission. ② According to specification of PAS2050, the space-time boundary, object boundary, element boundary and carbon source type of carbon emission of land consolidation project were clear. Based on these, the total carbon emission of the case would be calculated as 194 225.95 kg.[Conclusion] The carbon emission quota method has a good application prospect in the systematica comprehensive and accurate calculation of carbon emission in the construction process. Through compiling the standard of carbon emission quota of land development and consolidation project, developing the software of carbon emission quota of land consolidation project and optimizing and adjusting quota, the carbon emission quota method is applied in land consolidation practice, which would be beneficial to promoting energy conservation and emission reduction of land consolidation.