Embodiments of the present application disclose a method for advertising information about a PE device and a related apparatus, which are applied to a BGP-based MVPN. The method includes: a PE device in the MVPN determines a role of the PE device in the MVPN and a working status corresponding to the role, where the role is a root node and/or a leaf node, and the working status is active or standby; the PE device generates a BGP update message, carrying an IP address of the PE device, an identifier of the MVPN, the role of the PE device, and the working status of the PE device; and the PE device sends the BGP update message to a BGP neighbor of the PE device in the MVPN. The method and apparatus may alleviate a configuration workload and reduce an error occurrence during an application of a BGP-based MVPN.