The invention relates to a multifunctional automatic take-up and pay-off device of a transformer substation, and the multifunctional automatic take-up and pay-off device is especially suitable for useat a transformer substation maintenance site of an electrical system, and belongs to the technical field of field maintenance auxiliary tools at an operation field of the electrical system. The multifunctional automatic take-up and pay-off device comprises a wire winding disc mounted on a bracket body, wherein a cable with a plug is wound on the wire winding disc; a wire winding shaft is arrangedin front of the wire winding disc; a secondary wheel linked with the wire winding shaft is mounted at one side of the wire winding shaft; a primary wheel linked with the wire winding disc is arrangedat the same side of the wire winding disc; the primary wheel is linked with the secondary wheel through a caterpillar band; the primary wheel is driven by a direct-current motor; a cable slide wheelcapable of moving left and right in the length direction of the wire winding shaft in a rotation process of the wire winding shaft is mounted on the wire winding shaft; a through hole used for allowing the cable to pass through is formed in the cable slide wheel; and a power supply interface disc with a plurality of power supply interfaces is arranged at one side of the wire winding disc. The multifunctional automatic take-up and pay-off device is simple in structure, is convenient to use, is high in working efficiency, and has the functions of automatically taking up and paying off, illuminating, realizing over-current protection and having multiple power supply interfaces.