The great power’s game and the progress of science and technology are the main driving forces to promote the reform and development of global trade. Since the beginning of the 21st century，global trade has gone through the stages of traditional trade and global value chain，and is gradually stepping into a new era of digital economy dominated by international digital trade. As one of the main application scenarios of international digital trade，the rise and development of cross-border e-commerce has promoted the great development of trade globalization，which has been widely concerned and highly valued by every country. Various countries have carried out research on international rules of cross-border e-commerce，hoping to master the international discourse power and dominance by formulating new international economic order and rules. This paper summarizes the theoretical research status of international rules of cross-border e-commerce in various countries，and analyzing the main influencing factors such as economic basis，technical level，support facilities，development demands and so on. Combined with the theoretical research of various countries and the current situation of world economic，this paper proposes that the international digital trade will become the future development trend of cross-border e-commerce，and stating that the connotation of international digital trade. Compared and analyzed the relationship between cross-border e-commerce and international digital trade，and summarized the significance of international digital trade to the economic development of countries in the future. The general idea of establishing international digital trade rules system is clarified. The specific strategies for making new international trade rules are introduced from ten aspects，such as customs clearance system，inspection and quarantine system，credit system，statistical rules，and intelligent logistics.