The utility model discloses a fireproofing mud heating device of transformer substation, include: the shell adopts insulating material to make, heating mechanism is located in the shell, the fixed bolster adopts insulating material to make, connects the shell with between the heating mechanism, be used for making heating mechanism hangs and locates in the shell, heating mechanism includes the induction heating bucket and winds and establishes the induction heating coil outside the induction heating bucket, the induction heating bucket is including the staving, waterproof layer and cladding the insulating layer waterproof layer outside of cladding outside the staving that adopt magnetic materials to make. This device is to the professional heat -softened equipment of fireproofing mud design, has overcome the inconvenience that current construction method brought, the work efficiency that improves greatly, in addition, the waterproof layer of setting can prevent there is the water logging play because of the staving breaks, the insulating layer can reduce thermal loss, the shell can play machinery and insulation protection, and heat the mechanism hang locate the shell in, further play insulation protection.