The invention discloses a torrent fish domesticating method. After first filial generation of acipenser dabryanus of 1-5 ages is raised in a culture pond, and then the torrent fishes to domesticated are added to the pond for raising. According to the domesticating method, the acipenser dabryanus and the torrent fishes are raised together, so that the stress response of wild fishes can be reduced, and the ichthyophthirius multifiliis infection resistance and the large individual characteristics of the acipenser dabryanus are utilized, and torrent is created by fishtailing to drive the activity of the wild fishes; the large cluster of the wild fishes is reduced and the probability of reciprocal infection of the ichthyophthirius multifiliis is reduced; as a result, the ichthyophthirius multifiliis can be effectively prevented, the survival rate is increased, the drug use is reduced and the pollution to the water environment is reduced.