Knowledge graph construction method for integrating fragmented network security information

The invention belongs to the technical field of crossing of computer science and network security, particularly relates to a knowledge graph construction method for integrating fragmented network security information, and solves the problems that overlapped entities and discontinuous entities are difficult to process and knowledge graph entities are redundant in the prior art. Comprising the following steps: 1) collecting a large amount of open source security data as original data; 2) constructing a network security ontology model; 3) preprocessing the original data to obtain initial data, and manually annotating the data to construct a training set; 4) training a named entity recognition model, using the model and the network security ontology model to perform security entity recognition and relationship extraction on the initialized data, and using the graph database to construct a security knowledge graph; 5) realizing repeated entity screening based on multi-feature similarity to solve the redundancy pro