诊断知识处理是大型电站智能诊断系统的关键技术之一，针对电站设备故障诊断问题，提出了故障诊断的知识范围，对诊断知识进行了合理的分类，分别对这些知识的获取、混合知识的表示、诊断推理等方法进行了分析与研究，为最终建立大型电站智能诊断系统奠定基础 Diagnostic knowledge processing is one of the key technologies of intelligent diagnosis system for large power station. Aiming at the problem of power plant equipment fault diagnosis, the range of knowledge of fault diagnosis is put forward, and the diagnosis knowledge is classified reasonably. The knowledge acquisition, , Diagnostic reasoning and other methods were analyzed and studied in order to lay the foundation for the final establishment of large-scale intelligent diagnosis system for power stations