The invention discloses a cloud end searchable encryption method based on a personal interest user model. Firstly, a keyword dictionary and a retrieval tree are generated by a data owner for a document, and then a key for encrypting the document and a searchable encryption key for encrypting the keyword are generated; then the key, the searchable encryption key and the encrypted document are sentto the cloud server; then, by analyzing the user's search history, a simple user interest model is established for individual users; vectors are used to describe documents and queries, and inner product multiplication score is used to express users' interests skillfully. At the same time, matrix encryption and reference random number are used to ensure security. In addition, the greedy depth-firstalgorithm is used to prune the retrieval tree in advance to improve the efficiency of ciphertext retrieval. The invention adopts the searchable encryption model, binds the keyword and the document, and only searches the encrypted keyword, which reduces the workload of searching and makes the server not obtain any effective information.