There is still no uniform carbon emission calculation method in the construction stage of waterway regulation project.To solve the problem of carbon emission quantification in this stage,a carbon emission calculation method based on carbon emission factor method is established.By means of literature review,engineering investigation and theoretical analysis,this paper discusses the thinking and calculation method of carbon emission factor of energy,labor,ship,construction machinery and transportation service.Considering the characteristics of the construction stage,it is divided into construction scheme stage and implementation stage,and then the calculation method of carbon emission in the construction stage based on the carbon emission factor of the unit engineering quantity and the actual resource consumption is proposed.This method is conducive to the optimization of construction scheme based on low-carbon concept,as well as the calculation and evaluation of carbon emissions during and after construction.