The invention relates to a data transmission method and equipment, and belongs to the technical field of data transmission. The method is applied to a peer-to-peer transmission network, and the peer-to-peer transmission network is a tree-like transmission network including multiple pieces of peer-to-peer transmission equipment. The method comprises the following steps that: first transmission equipment determines second transmission equipment from upper-layer equipment relative to the first transmission equipment in the peer-to-peer transmission network; the first transmission equipment sends a subscription request to the second transmission equipment; and the first transmission equipment receives specified data flow transmitted by the second transmission equipment, wherein the specified data flow comes from top-layer equipment in the peer-to-peer transmission network. The first transmission equipment in the peer-to-peer transmission network can directly request upper-layer equipment for the specified data flow from the top-layer equipment by determining the upper-layer equipment directly connected with the first transmission equipment in the tree-like peer-to-peer transmission network without acquiring equipment information of other peer-to-peer transmission equipment, so that time delay of peer-to-peer transmission is reduced, and the transmission effect of the peer-to-peer network is improved.