With the Internet continuing its expansion in range and its increase of linking density, the BGP routing protocol, which works as the inter-domain route standard, has met serious challenge. The emergence of clustered router, which has the advantages of distributed storage, computation resources and high extensibility in system and structure, is helpful for people to meet the challenges. Considering that BGP protocol architecture is not suitable for clustered router, this paper proposes a new distributed BGP architecture, which can take advantage of distributed resources of clustered router greatly. Compared with traditional BGP architecture, the distributed BGP architecture can improve protocol reliability, lower administration costs, simplify BGP network topology and improve BGP scalability.