Disclosed are a method and apparatus for allocating a resource on a PC5 interface, comprising: acquiring a PC5 aggregation maximum bit rate of a user equipment; and after receiving a request for allocating a resource on a PC5 interface for the user equipment, allocating the resource on the PC5 interface according to the PC5 aggregation maximum bit rate of the user equipment. According to the present application, when a plurality of user equipment use a PC5 interface to perform communication, the solution of controlling, on the PC5, the total resources used by a UE on the PC5 interface can be provided, thus better controlling the service quality on the PC5 interface, and making up for the shortcomings of the prior art.