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Data model is the core knowledge of database course. A deep understanding of data model is the key to mastering database design and application. The data models of NoSQL databases are categorized as key-value stores, column-oriented stores, document-oriented stores and graph databases. This paper makes a comparative analysis of the characteristics of the relational data model and NoSQL data models, and gives the design and implementation of different data models combined with cases, so that students can master the relevant theories and application methods of the database model.