Abstract: Under the new background of ecological civilization construction and“dual carbon”goal,more and more attention has been paid to the study of carbon effect of land consolidation projects. Based on the theory of carbon effect,from engineering construction effect of carbon,the carbon effect of land use structure and farmland carbon effect on three aspects of the management construction of land reclamation carbon effect analysis model,with Kinghsien Renovation Project in Hebei Province as an example,by using material balance algorithm,ecosystem types,such as carbon effect of land reclamation project,carbon break-even analysis,the studied area,the time to reach the carbon break-even point is calculated. The results show that:（1）the total carbon emission of the project construction is 8 988 t,of which the shelterbelt carbon sink is 197 t,the net carbon emission is 8 791 t,the main source of carbon emission is lime and concrete.（2）The carbon sink increment of land use structure is 1 611 t,mainly from the increase of cropland and garden area.（3）In the carbon effect of farmland management,the carbon sink increment of farmland ecosystem is 2 662 t,mainly due to the improvement of crop economic yield. With the increase in cultivated land area,the corresponding agricultural input will increase,resulting in an increase of 111 t of carbon emissions generated by agricultural farming.（4）Land consolidation has no negative impact on the ecological environment,and the time to reach the carbon break-even point in the study area is 2.06 years,that is,since the completion of the project,the carbon emissions generated by the construction can be offset after 2.06 years.