Abstract: According to the new requirements of national excellent course and course ideological and political construction, teaching exploration and practice of the main course of water science and engineering “water quality engineering 1” is implemented. This paper analyzed the existed teaching situation and problems, considering the problems in theoretical knowledge characteristic, teaching content and depth, compatibility of theoretical teaching and practice teaching, students study autonomy, put forward a series of teaching reforms from teaching content, teaching design, teaching model and course of ideological and political education.