Access control method and device of core network operation maintenance management system

The invention discloses an access control method and device for a core network operation maintenance management system. The method comprises the following steps: a microservice gateway receives a first access request sent by a user side, wherein the first access request comprises an external identifier; after the micro-service gateway passes the verification of the external identifier, searching an internal identifier corresponding to the external identifier; the microservice gateway sends a second access request carrying the internal identifier to the business service module, the business service module verifies the second access request through the locally cached internal identifier and the authority blacklist, and the locally cached internal identifier and the authority blacklist of the business service module come from the authentication service module; the second access request and the first access request are the same access request. According to the method and the device, the security problem that iden