The utility model discloses an insulating tool bin body comprises a plurality of side walls which are connected to form a cylindrical shape, a bin top and a bottom plate. At least one side wall is provided with a bin door. The bin top is in sealing connection with the top ends of the side walls. The bottom plate is in sealing connection with the bottom ends of the side walls. The side walls comprise outer metal plates, inner metal plates and keel frames fixed between the outer metal plates and the inner metal plates. The gaps between the outer metal plates and the inner metal plates are filled with heat preservation flame-resistant materials. During using, the heat preservation flame-resistant materials are arranged in the side walls, so that temperature in the bin body and outside the bin body cannot be subjected to heat exchanging easily, humidity exchanging cannot happen easily, accordingly, after a hot-line-working tool is placed in the insulating tool bin body, the insulating tool bin body is conveyed to a field for operation, humidity and temperature changing in the bin body is small, then humidity and temperature in the bin body can be guaranteed, and compared with a common tool kit in the prior art, the insulation level of the hot-line-working tool placed in the bin body is guaranteed.