The invention relates to a breeding method for a poultry breed, specifically to a method for improving the accuracy rate of fast and slow feathering automatic female-male identification for Dagu chicken. The method comprises the following steps: (1) establishing an ancestral breeder flock, and separating fast-feathering chicken from slow-feathering chicken; (2) carrying out test-crossing so as todetermine homozygous slow-feathering male chicken, and subjecting the homozygous slow-feathering male chicken and slow-feathering female chicken to pure breeding so as to establish a maternal breederflock; (3) subjecting fast-feathering female chicken and fast-feathering male chicken to pure breeding, and carrying out breeding for four generations so as to establish a stable paternal breeder flock; and (4) subjecting paternal fast-feathering male chicken and maternal slow-feathering female chicken to cross-breeding so as to obtain offsprings which are commercial chicks capable of realizing female-male identification through fast and slow feathering, wherein fast-feathering chicks are female chicks, and slow-feathering chicks are male chicks. With the method improved by adopting the theoryof genetics, the accuracy rate of fast and slow feathering identification for the commercial chicks is increased to 98% or above; when chicks are newly born, male chicks and female chicks can be identified according to feather types; and the chicks with a needed sex can be selected for feeding according to different production directions, so the cost of feeding is saved, and economic benefits ofa farm are improved.