针对泵叶轮磨损的常规判据和可靠性分析方法的不足，应用模糊数学理论，提出了泵叶轮磨损失效判据的模糊可靠性计算方法，并采用泵叶轮磨损算例证明此方法是适用的．研究结果表明，模糊可靠度计算方法较常规方法更为精确，它不仅反映了叶轮磨损程度和磨损失效现象的随机性，也反映了叶轮磨损失效判定的模糊性，实质上是在某种合理的程度上放宽了叶轮磨损失效判定的限度，从而可以达到延长泵的使用寿命，减少经济损失的目的 Aiming at the insufficiency of routine criterion and reliability analysis method of pump impeller wear, a fuzzy reliability calculation method of pump impeller wear failure criterion is put forward by applying fuzzy mathematics theory. The example of pump impeller wear proof is proved to be suitable. The results show that the fuzzy reliability calculation method is more accurate than the conventional method, which not only reflects the randomness of the impeller wear degree and wear failure phenomenon, but also reflects the fuzziness of impeller wear failure judgment. In fact, The degree of relaxation of impeller wear and tear of the failure to determine the limits, which can be extended to extend the life of the pump and reduce the purpose of economic losses