Fluid mechanics as a physics branch and a basic course is widely studied in universities, which plays an important role in the ideological and political education in promoting scientific spirit and shaping value orientation. How to integrate ideological and political elements into classroom teaching to arouse students resonance has become the key for teachers. Taking Dujiangyan irrigation project as a specific teaching case, this paper discusses how to establish the ideological and political teaching case of fluid mechanics, including case content, instructional design, case features, and feedback. This teaching case aiming at making students feel and resonate and providing useful inspiration and reference for the ideological and political teaching of basic courses.