Artificial breeding of loach seedlings is a long-term, arduous and highly technical work. Generally, farmers are required to have many years of experience in loach breeding and experience in artificial breeding of other cultured fish in order to breed loach fry well. There are generally five steps in the breeding process of loach fry. The first step is to select the parent loach suitable for breeding, and then carefully cultivate the parent loach. This is the basis of loach breeding and one of the most important tasks. Step 2, when the water temperature is suitable and the gonads of the parent loach are mature, mating, oviposition and fertilization of the parent loach can be carried out. After artificial breeding and selection, loach can be bred by male and female pairs, so that the parent loach can naturally mate and lay eggs and fertilize, or by artificial spawning and artificial insemination. The third step is the incubation of fertilized eggs. Generally, eggs are collected and artificially hatched. The fourth step is to raise the loach seedlings. Generally, cement pools can be used, and small soil pools can also be used. The fifth step is to cultivate the seeds. Generally, larger soil ponds are used, and rice fields, cages, aquatic crop fields, etc. can also be used. Some areas in the south have omitted this step and directly entered the stage of human loach culture.