Underground transformer substation

The invention discloses an underground transformer substation which comprises an underground transformer substation facility room, a first production management room, a second production management room, a third production management room, an underground garage, a firefighting loop and an emergency firefighting access. The underground transformer substation facility room and the underground garage are arranged in an underground space of the underground transformer substation, and an isolation access with the width of 15m is arranged between the underground garage and the underground transformer substation; the first production management room, the second production management room, the third production management room and the emergency firefighting access are positioned on the ground above the underground transformer substation facility room, and the emergency firefighting access with the width of 4m is parallel to the isolation access; the first production management room, the second production management room and the third production management room are sequentially arranged along the emergency firefighting access and are communicated with the emergency firefighting access; the emergency firefighting access is provided with a firefighting emergency evacuation exit which is positioned right above the underground transformer substation facility room. The firefighting loop encircles the first production management room, the second production management room and the third production management room.