Enterprise knowledge management is very important,but traditional enterprise knowledge management systems suffer from high construction costs and low knowledge utilization rate.A scheme to build enterprise knowledge management system based on retrieval-augmented generation(RAG)technology is proposed.Firstly,the overall scheme architecture,business processes and four types of knowl-edge construction technologies are introduced,and then the whole process of knowledge retrieval technology are discussed,such as re-trieval pre-processing,knowledge retrieval,retrieval post-processing,and subsequently a comprehensive evaluation framework is de-signed.The scheme has the characteristics and advantages of high efficiency and low cost of knowledge construction,accurate intention un-derstanding,and accurate knowledge retrieval.