The utility model discloses a heat-insulation temperature-reducing box which comprises a box body. The box body is provided with a heat-insulation device. The heat-insulation device comprises an adhesive layer, a bending layer and a heat-insulation layer. The two sides of the bending layer are respectively provided with a bending portion, wherein the bending portions are glued to the outer side surface of the box body through the adhesive layer and a channel, of which the upper and lower two ends are communicated is formed between the outer side surface of the box body and the bending layer. The heat-insulation layer is covered on the outer side of the bending layer. The outer surface of the heat-insulation layer is coated with a heat-insulation coating layer. The lower bottom surface of the box body is coated with a heat-conductive coating layer. The heat-insulation temperature-reducing box can enable the temperature in the box body to reduce to the environment temperature naturally, and thus running reliability of electrical equipment in the box body at the high-temperature and high-load time period is improved.