Abstract: In order to deeply integrate water projects dispatch and new generation information technology，based on the business needs of water projects joint scheduling in basins，this paper outlined a reasonable technical scheme for the construction and application of knowledge graph for water projects joint scheduling，which follows a general idea of knowledge modeling，knowledge extraction，knowledge storage and knowledge application.The research innovatively proposed a scenario-driven ontology construction method for water projects joint scheduling，and elaborated structured and unstructured information mining techniques，knowledge extraction，completed the knowledge indexing and visualization functions based on the Neo4j graph database，and explored the application examples and development direction of the knowledge graph from the aspects of flood control scheduling and water resources allocation.The research initially realizes the whole process of scheduling knowledge graph construction，which can provide reference for further development of knowledge graph in the field of water projects joint scheduling.