Household small transformer

The invention provides a household small transformer. The small transformer comprises a protection box, a protection box cover, a lock, a first positioning plate, a second positioning plate, a transformer body, a coil, an iron core, a fixing plate and a suction cups. A protection box cover is vertically connected to the outer portion of the protection box, a lock is installed on the protection boxcover, and two positioning plates are installed on the upper side and the lower side of the protection box. A transformer is arranged in the protection box, a coil is arranged in the transformer, andthe coil is wound on an iron core in the coil. A fixing plate is installed at the lower end of the transformer, and the lower end of the fixing plate is tightly connected with the protection box. Suction cups are installed on the outer side of the back of the protection box. The transformer is provided with the protection box and the protection box cover, and the problem of electric shock causedby careless contact with th