The widespread use of E-commerce in the world is a new revolution in international trade. But it is regarded as a double-edged sword for the international trade. Some figure that E-commerce has a positive impetus for the development of international trade. The rest holds the view that E-commerce has worsened the trade conditions, especially, in the developing countries, like the massive tax loss. However, there are a few empirical studies on the dynamic relationship between E-commerce and international trade in the developing countries. China as a biggest developing country in the world, therefore, this paper uses the datum from 2000 to 2016 to explore the dynamic relationship between E-commerce and international trade in China via the method of combining theoretical model and empirical analysis. Preforming an empirical analysis under vector error correction model, the empirical analysis results indicate that the long-run relationship between E-commerce and international trade exists in China. More specifically, E-commerce has a positive effect on international trade.