First of all, this paper summarizes the research progress of international Chemicals which are a kind of products that cannot be ignored in people’s life and production. Under the call of national policy of fine chemical and green chemical industry, in recent years, China’s chemical products output ranks the top in the world, and the export trade grows rapidly, but the export of domestic chemical products keeps a deficit in foreign trade. In the face of complex and changeable international competition and foreign trade situation, it is helpful for the sustainable and healthy development and progress of domestic economy to comprehensively analyze and elaborate the structure, competitiveness and related influencing factors of China’s chemical export. This paper analyzes the research and development of international competitiveness and constructs the research framework and main research methods of this paper. Based on the research results of international competitiveness at home and abroad, the evaluation system of export competitiveness of Chinese chemicals is constructed. Secondly, this paper analyzes the export status of domestic chemicals and related manufactured products from the main body of chemical exports, chemical exports and chemical export regions. This paper analyzes the international competitiveness level of chemical products in China by using the international market share, dominant comparative advantage index and trade competitiveness index. The results show that at present, China’s chemical products are still very lack of international competitiveness. In order to further analyze the factors that affect the competitiveness of chemical manufacturing industry, based on Porter diamond model and previous research results, this paper establishes a multiple regression model, and analyzes the impact of four indicators of capital, scientific research and innovation level, industrial concentration and scale economy on the international competitiveness of chemical manufacturing industry. Finally, based on the results of empirical analysis, this paper puts forward suggestions to improve the export competitiveness of domestic chemicals and related manufactured goods.