The invention discloses a method for building congenital hypothyroidism rat models, belongs to a test method for medical experiment animals and aims to provide a rat suffering from congenital hypothyroidism and cultivated by a physical method, so that a new way and possibility are provided for research on disease pathogenic mechanism, diagnosis, treatment and prevention. The method comprises the following steps: performing composite stimulation treatment, such as bounding, exhausting, tail clamping and the like, on adult female SD rats for 5 weeks continuously; and mating the adult female SD rats with the normal male SD rats and breeding the next generation, wherein the bred newborn rats are the rats suffering from congenital hypothyroidism. The method is high in stability and repeatability and is a method for reproducing congenital hypothyroidism rats by the physical method.