Abstract:The construction of public employment service knowledge base system and the implementation of knowledge management of public employment service are of great practical significance in promoting the implementation of Omni-directional public employment service.This paper analyses and combs the current situation of the application of public employment service knowledge base,and studies the specific content of knowledge management of public employment service based on knowledge life cycle theory, constructs the logical model of public employment service knowledge base system, and puts forward the implementation steps and safeguard measures for the construction of public employment service knowledge base.Provide scientific and reliable ideas and reference for local government to build public employment service knowledge base system and realize knowledge management.