Single-phase control transformer

The utility model relates to the technical field of transformers, and discloses a single-phase control transformer which comprises a heat dissipation plate and a bottom plate, a protective shell is fixedly connected to the top of the bottom plate, a threaded rod is rotatably connected to the top of the protective shell, the heat dissipation plate penetrates through one side of the protective shell, and cooling mechanisms are arranged on the two sides of the heat dissipation plate. Heat volatilization on the surface of the cooling pipe can be accelerated through rapid circulation of cooling liquid in the cooling pipe, the cooling speed of the cooling plate can be increased through lap joint of the cooling pipe and the cooling plate, air flowing is accelerated through the exhaust fan, air is filtered through the first filter plate and the second filter plate, heat dissipation of the interior of the protective shell is guaranteed, and meanwhile the heat dissipation efficiency of the protective shell is improved.