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This paper proposes a new Hierarchical application layer multicast (HALM) algorithm based on physical topology information of network, which is specifically designed for large-scale video-broadcast services in Internet. The algorithm can make full use the incomplete topological Information to build effective overlay network. With according to the topological Information rather than random method to select neighbor peers, the algorithm has some well characters: low link press; low latency; significantly relieve the bandwidth consumption; good scalability, and so on. Using simulations, this paper shows that this algorithm offers a well-balanced solution that is better performance than existing algorithms like HMTP and HOMP in terms of some important data delivery parameters.