Primary and secondary information science as an engineering discipline, how to promote students' mastery of information science has become one of the most important topics in the research of information science. In this paper, the knowledge map is introduced to manage the knowledge of information science. The knowledge map of information Olympiad in primary and secondary schools is drawn by constructing the knowledge map model. It can help students understand knowledge correctly in the process of information overload by presenting the relationship between knowledge nodes, and it is used to organize and display the knowledge nodes and their relationships.