The invention provides a cultivating method for offspring seeds of spotted trout. By the cultivating method, a large quantity of high-quality and healthy spotted trout fries can be acquired, and survival rate of juvenile fishes is high, so that cultivation popularization and factorization of the spotted trout can be realized. The cultivating method includes the following steps: (1), transporting eyed eggs of the spotted trout, (2), incubating the eyed eggs, (3), cultivating the fries at an early stage, (4), cultivating the fries at a late stage, (5) cultivating advanced fries, and (6), cultivating the juvenile fishes. By the cultivating method, incubation and cultivation conditions for the eyed eggs of the spotted trout are acquired; experiments show that incubation rate of the eyed eggs of the spotted trout can be increased to 97%, and the survival rate of the fries can reach 92%; and through the cultivating method, the fries grow quickly, cultivation cycle can be shortened, and cultivation cost can be reduced.