The utility model provides a box-type transformer which comprises a body and a protection part, wherein the protection part is arranged on the outer side of the body; and the protection part surrounds the body or covers the outer surface of the body. With the adoption of the technical scheme in the utility model, the protection part is arranged on the outer part of the body, so that the aim of protecting the body is achieved. The components inside the body are protected by the shell of the body, the shell of the body is protected by the protection part, and the shell is prevented from being affected with damp so as to mildew, so that the box-type transformer can well adapt to a complex field environment, and the reliability of the box-type transformer is improved.