介绍选矿专家系统环境的知识管理机制 ,设计MPESE系统的面向对象知识表示方法。规则与框架结合表示知识的层次性 ,框架与模型相结合表示计算模型 ,改进的主观Bayes方法和可信度理论表示知识的不确定性。知识的获取主要包括人工知识获取及知识的自动学习 This paper introduces the knowledge management mechanism of mineral processing expert system environment and designs the object-oriented knowledge representation method of MPESE system. The combination of rule and framework expresses the level of knowledge, and the combination of framework and model expresses the calculation model. The improved subjective Bayes method and credibility theory represent the uncertainty of knowledge. The acquisition of knowledge mainly includes the acquisition of artificial knowledge and the automatic learning of knowledge