“管灌”是目前我国应用最为广泛的节水灌溉方式．本文基于管灌系统自身的特点，通过系统分析及模糊理论的引入，提出了一种管灌系统可靠性评价方法，并给出了一个算例 “Pipe irrigation” is currently China’s most widely used water-saving irrigation. Based on the characteristics of pipe-irrigation system, this paper presents a method of pipe-irrigation system reliability evaluation through system analysis and introduction of fuzzy theory, and gives an example