The invention discloses a method for massively producing all-female loaches. The method for massively producing the loaches comprises the steps that healthy and good female fishes are screened for backup parents, prenatal intensive cultivation and artificial spawning inducement are conducted, and all-female diploid fries are obtained by adopting a gynogenesis method achieved through heterologous sperm stimulation and cold shock treatment; artemia larvae soaked with a methyltestosterone male sex hormone solution with the concentration of 50 mg / kg are continuously taken as baits for 30 days, and XXo+ female fishes in the loach fries are subjected to sex reversal to be XXo+ physiological male fishes; the full-female diploid normal fish fries mate with the physiological male fishes, and then the 100 full-female loaches are massively produced. Compared with the prior art, the method has the advantages that the full-female loaches are massively produced by combining a gynogenesis technology with a sex reversal technology, and therefore the per mu yield and the culturing benefit are significantly increased; by means of the gynogenesis technology, a pure line can be rapidly established, very rich materials can be provided for genetic breeding, the breeding cycle of the full-female loaches can be shortened, and the gynogenesis technology is suitable for the massive production requirements and easier to apply and popularize.