The invention provides a hot seed file acquisition method in a BT (BitTorrent) network. The hot seed file acquisition method in the BT network comprises the following steps of 1) constructing a plurality of virtual BT client sides, wherein the IDs (Identity) of the virtual BT client sides are evenly distributed in a BT network ID logic space; 2) monitoring get_peers messages in the BT network by each virtual BT client side, and calculating the number of received get_peer messages corresponding to each infohash; 3) calculating the number of the get_peer messages which are received by all virtual BT client sides and correspond to each infohash in a fixed time; according to the number of the get_peer messages, determining whether the corresponding infohash is hot infohash or not. After adopting the hot seed file acquisition method in the BT network, which is disclosed by the invention, the hot seed files in the whole BT network range can be comprehensively and accurately obtained.