High-low voltage prefabricated substation

The utility model relates to the technical field of transformer substations, and discloses a high-low voltage prefabricated transformer substation, which comprises a transformer substation assembly and a safety assembly, the transformer substation assembly comprises a box body, the safety assembly is fixedly connected in the box body, the safety assembly comprises a reinforcing frame, and connecting blocks are fixedly mounted at corners of the reinforcing frame. A noise reduction plate is fixedly connected outside the reinforcing frame, a smoke sensor is fixedly mounted on the inner wall of one side of the box body, a fire extinguishing part is arranged at the top end in the box body, and a humidity sensor is fixedly mounted on the inner wall of the other side of the box body; a reinforcing frame is arranged in the box body, the firmness of the whole device is effectively improved, when an internal circuit is on fire, an internal smoke sensor receives a signal to control a fire extinguishing part to conduct f