It is not difficult to find out by studying the construction and learning technology of knowledge map. As the core and foundation of the change of artificial intelligence from perceptual intelligence to cognitive intelligence

knowledge map is one of the key technologies for the transformation and upgrading of all walks of life from networking to intelligence. It also provides a new technical means for the core and basic problem of personalized teaching and learning - domain knowledge modeling. In view of the extremely complex problems involved in the breadth

depth

type and source of educational big data

this paper carries out the research on educational big data in the aspects of knowledge point extraction

knowledge association analysis

knowledge disambiguation

knowledge de duplication and knowledge splitting. Based on the general knowledge map

this paper discusses the research on heterogeneous data text information mining

knowledge expression

knowledge association and cognitive state model construction The analysis of key technologies such as learning path research is to build the conceptual model of educational knowledge map and realize intelligent high-quality educational applications such as personalized learning

accurate Resource Recommendation and accurate teaching.