Relying on the Belt and Road Initiative and the strategic deployment of building a strong education nation, internationalization of higher education has become a crucial path to enhance the quality of talent cultivation. Aiming at the practical problems in the teaching of civil engineering international students, such as content limited to domestic codes, insufficient international resources, and rigid integration of ideological and political education, this paper proposes to take the course “Reinforced Concrete Structures” as an example to construct an international teaching system based on the comparison of multi-national codes. By sorting out the similarities and differences in concrete structure principles and other aspects between Chinese codes and the mainstream codes of Belt and Road countries, an international standard curriculum resource library is established. Meanwhile, a “salt-in-soup” style of implicit ideological and political education model is explored, integrating China’s engineering achievements and the spirit of scientists into professional teaching, to help cultivate high-level international talents who are proficient in international rules, possess cross-cultural engineering practice capabilities, and have an affinity for and understanding of China. This teaching reform model, with the concrete structure course as its carrier, has formed a replicable and scalable paradigm for international curriculum development, which holds significant value for the internationalization teaching reform of other engineering majors such as bridge engineering, geotechnical engineering, and underground engineering.