Hierarchical protection method for bank multi-database operation and maintenance information

The invention relates to the technical field of data processing, in particular to a hierarchical protection method for bank multi-database operation and maintenance information, and the method comprises the steps: collecting a plurality of user business data of each user business type in each user; obtaining a plurality of user data point sets, and obtaining a plurality of levels of clustering clusters according to the change similarity condition of user service data among different user service types; obtaining a to-be-protected degree of each user data point set according to an information distribution trend condition of the whole user data point set in the level clustering cluster and an information change difference condition among different user data point sets; and according to the to-be-protected degree of each user data point set, performing screening generalization on all the user data point sets to obtain a plurality of pieces of generalized user service data. The accuracy of the protection result i