With the promotion of internationalization process and "sponge city" construction, it is imperative to cultivate professional talents of water supply and drainage engineering with international vision. Based on the exploration about the current status and existing problems of water supply and drainage engineering specialty English teaching, an internationalization-oriented "three combinations" teaching system was presented here. It includes "combination of fundamental theory and engineering practice", "combination of domestic status and international frontier", and "combination of classroom learning and self-study". The establishment of this system will be significant in specialty English teaching renovation for water supply and drainage engineering, and the enhancement of the students' international vision and international competitiveness.