A service registration method and usage method, and a related apparatus are used to reduce risks generated when a service of an AP-type service providing node cannot be registered and a CP-type service providing node provides a service since distributed characteristics of a service providing node are not distinguished in a network partition scenario. The method is: obtaining, by a registration service node, network partition information, and receiving a registration request of a service providing node, where the registration request carries a distributed characteristic of the service providing node, and the distributed characteristic meets both consistency and partition tolerance, or meets both availability and partition tolerance; and determining, by the registration service node according to the network partition information and the distributed characteristic of the service providing node, whether registration of a service provided by the service providing node is allowed.