s: Driven by the ”dual-carbon” target, it’s best time for great development for zero-carbon energy, which is a huge role in promoting the emission reduction of commercial vehicles. Based on zero-carbon (Green Electricity, Green Hydrogen and Green Ammonia), this paper carries out the research about carbon emissions prediction between zero-carbon energy and diesel in light-duty trucks and different penetration projects of zero-carbon energy from 2020 to 2060, and the changes in the quantity of light-duty trucks (including stock, increment, scrap and total amount). The calculation results show that CO2 emissions from Diesel is the largest, and shows a gradual upward trend in general, and reaches peak value in 2055 (1.793 billion tons). Based on different penetration projects for Green Electricity trucks, CO2 emissions of peaking is in 2035. As penetration increases, CO2 emissions gradually declines. Reduction of CO2 emissions of Project_1 is 19.94% will stabilizes after 2055, however CO2 emissions of Project_4 stabilizes after 2040 and 15 years earlier than Project_4’s, and CO2 emissions is nearly zero. The change rule of CO2 emissions from ”Diesel + Green Hydrogen” and ”Diesel + Green Ammonia” is similar, and CO2 emissions from ”Diesel + Green Ammonia” is higher than that of ”Diesel + Green Hydrogen”. The permeability of Project_4 changes greatly, and the results is a large reduction. Based on 2020’s data, and as gray ammonia is fuel, the results show that the current overall emission level can be reduced only when the CO2 emissions level for the production of ash ammonia reduces less than 30% of the current level.