The utility model discloses a detachable transformer underframe, including underframe body, hoisting accessory, transformer installation position, transformer stopper and apron, the underframe body is formed by the channel -section steel welding, hoisting accessory telescopically sets up around the underframe body, transformer installation position sets up the middle part of underframe body, transformer installation position is rectangle frame structure by the channel -section steel welding, be provided with a plurality of transformer mounting holes, every on the channel -section steel of transformer installation position all weld one on the transformer mounting hole the transformer stopper, the side sets up one respectively about transformer installation position the apron. The utility model discloses a detachable transformer underframe, can be with transformer separation so that production and installation, made things convenient for the connection and the fixed action of transformer.