In the global economic system, the stable development of agriculture as a basic industry is inseparable from the rational utilization of water resources. Irrigation projects play a vital role in ensuring agricultural water use, increasing grain output and promoting agricultural sustainable development. This study aims to explore the scientific experience of Baiqi Canal, an excellent irrigation project in ancient China, and its profound value as a world irrigation project heritage, analyze the importance of irrigation projects to agricultural water resources, and promote the protection and sustainable utilization of irrigation project heritage. Firstly, the irrigation mode of Baiqi Canal and its important role in agricultural development were introduced, and then its influence on local agricultural water resources and ecological environment was analyzed. Finally, the positive influence of international irrigation projects on agricultural water resources was further discussed, and its key role in ensuring food security and promoting agricultural sustainable development was emphasized.