[Purpose/significance] Knowledge extraction is an indispensable part of knowledge management. Through knowledge extraction, individuals and organizations can avoid detours and effectively enlarge the value of knowledge management. [Method/process] On the basis of the summary of knowledge extraction practice, four typical implementation modes and three-force model of achievement promotion were extracted. Enterprise knowledge management promoters can choose and design their own implementation solutions according to the characteristics of the organization. [Result/Conclusion] Knowledge extraction is a necessary basic skill for knowledge workers to become senior experts, and it is also a strong support for the organization to take knowledge management to a higher level, which is worth promoting.