Economic globalization and regional economic integration, as the two major upsurge of world economic development today, have injected a steady stream of impetus into the development of the world economy. With the development of economic globalization, more and more countries are actively promoting the trade liberalization strategy. Since the early 1990s, although economic globalization has developed rapidly, national economies are still in a very unbalanced development. In order to further strengthen the trade relations of various countries, improve the current situation of unbalanced economic development, and achieve the goal of trade liberalization, FTA began to embark on the international stage, injecting a fresh blood into international free trade. China and South Korea are not only important countries in the Asia-Pacific region, but also the second and eleventh largest economies in the world. They play a pivotal role in the region and even the world. It is precisely that China and South Korea’s FTAstrategy unfolded in such a context. Rules of origin as the basis for determining the “economic nationality” of goods are an important part of free trade agreements. The determination of rules of origin has a key role in the implementation effect of FTA. Because, only after determining the rule of origin, the object of tariff preference or tariff reduction can be clearly defined. At the same time, the reduction degree of tariff concessions will vary according to the scope of origin identification. Although there is many literature on the rules of origin, it is not much about exploring the FTA rules of origin in China and South Korea. This study analyzes the case of rules of origin between Korea and China, through the analysis of successful cases and failure cases and the summary in literature studies. At the same time, in view of these problem points, put forward reasonable policy suggestions. With the background of the FTA already signed between South Korea and China, this study expounds the concept, classification and role of the rules of origin and the main contents involved in the rules of origin. By studying the North American model, the rules of origin under the EU model and the ASEAN model, the main characteristics of the three modes are summarized, and provide the research basis and theoretical basis for the improvement of the rules of origin between South Korea and China. In the origin identification standards, China and South Korea apply substantive change standards. South Korea mainly uses tax classification change standard to determine the origin of each product, China is the early FTA ad valorem percentage standard, signed FTA in recent years began to tax classification change standard, and tax classification change the standard applicable proportion is gradually expanding, and the origin identification standard become more diversified. Both the independent certification system and the institutional certification system were selected in the FTAs signed between South Korea and various countries in the confirmation of origin process, but all the FTAs signed by China so far have adopted the institutional certification system. Therefore, it is particularly important to optimize the origin identification standard. When participating in the negotiation of rules of origin in the future, we should conform to the development trend and gradually coordinate and optimize the origin of recognition standard, applicable to the tax change standard and the regional value composition standard and processing process standard. The research on the rules of origin started earlier, and the rule formulation and implementation were more flexible. However, the relevant laws of origin are mainly reflected in many laws and regulations such as the Foreign Trade Law and the Customs Law, but the rules of origin are too scattered, and some rules of origin in different regulations will appear in conflict. At the same time, the complexity of tariff rate and standard of origin caused by the expansion of FTAscope, additional costs caused by complicated certificate of origin procedures, and low FTA utilization rate of enterprises. In this regard, South Korea needs to unify the rules of origin standards, simplify the relevant provisions of origin, simplify and customize the issuance procedures of certificates of origin, and improve the utilization rate of FTA through professional training. Compared with South Korea, Chinese rules of origin are relatively weak in the relevant legal system of origin. The integrity and structure of the legislative system are still lacking, and it is not rigorous enough in standards formulation and operation implementation, which hinders the sustainable and healthy development of China’s import and export trade. For some special imported goods, the legal provisions lack clear provisions, and even the administrative regulations at the national level have not been passed, with only the interim provisions of the General Administration of Customs, which greatly reduces the legal effect of the identification of origin. It can be concluded that China needs to establish a system of rules of origin, with a complete structure, clear definition and more specific classification of goods. Formulate procedures for resolving disputes of origin suitable for China’s national conditions. And address the loopholes in the management of certificate of origin issuance. Strengthen the attention of enterprises to the rules of origin, improve the training of professionals, so as to improve the utilization rate of the rules of origin, and effectively reduce the tariffs and surcharges generated by enterprises in the process of import and export.