The present document relates to the field of communication, provides a method, device and system for managing multi-connection of a terminal. The method includes: a source base station of a terminal controlling the terminal to establish a connection with at least one of other base stations and updating a path over which the terminal transmits data to passing through the source base station and the at least one of other base stations after the terminal has established the connection with the at least one of other base stations. The technical scheme provided by the embodiments of the present document is applicable to LTE systems, solves the problem of managing the multi-connection existing between the terminal and multiple base stations, and implements the management for the multi-connection of the terminal.