With the expansion of China's manufacturing export trade to the countries along "the Belt and Road", the energy consumption and carbon emissions of China's manufacturing process from production to export caused by these countries will also increase. This paper adopts the MRIO model to calculate the export embodied carbon emissions of China's manufacturing export trade from 2000 to 2015, and further adopts the LMDI method to study the driving factors of export embodied carbon emissions of China's manufacturing export trade from three aspects: scale effects, structural effects and technical effects. The results indicate an increasing trend of the export embodied carbon emissions from 2000 to 2015. Scale effect has a pulling effect on the export embodied carbon emissions, while structural and technical effects have a restraining effect mostly on manufacturing. Therefore, in order to facilitate the entire process in the manufacturing chain of China's manufacturing industry, which includes the acquisition of raw materials, manufacturing, and transportation, and to achieve green development, it is necessary for China to optimize the manufacturing export structure and reduce the carbon emissions intensity to reduce the embodied carbon emissions of manufacturing industries to the countries along "the Belt and Road".