Data desensitization method and device

The invention discloses a data desensitization method and device, and the method comprises the steps: firstly obtaining a business access request of a target user, determining a target role corresponding to the target user, and determining a target role authority corresponding to the target role in a preset role authority library, if the access statement of the target user is matched with a target access statement corresponding to the target role permission, determining sensitive statements in the access statement of the target user, then determining sensitive data corresponding to the sensitive statements from a preset sensitive database, and according to the target role permission and service scene requirements, determining sensitive data corresponding to the sensitive statements; and determining a target desensitization rule from a preset desensitization rule base, performing desensitization processing on the sensitive data by adopting the target desensitization rule to obtain target desensitization data,