The invention provides a container prefabricated-cabin transformer substation. The prefabricated-cabin transformer substation comprises a transformer which is in an outdoor use type, and is characterized in that the prefabricated-cabin transformer substation further comprises a high-pressure prefabricated cabin, a low-pressure prefabricated cabin and a secondary protection prefabricated cabin, wherein the high-pressure prefabricated cabin is provided with a cable which is connected with a high-pressure side of the transformer, and the high-pressure prefabricated cabin is made into a first container, the low-pressure prefabricated cabin is provided with a cable which is connected with a low-pressure side of the transformer, and the low-pressure prefabricated cabin is made into a second container; the secondary protection prefabricated cabin is provided with a cable which is connected with the transformer, and the secondary protection prefabricated cabin is made into a third container. Thereby, individualized design can be performed on devices required by the transformer substation according to actual demands, and the container prefabricated-cabin transformer substation is uniform in sizes, convenient to transport and easily extensible.