The utility model relates to the technical field of color steel composite boards, and discloses a color steel composite board with a heat insulation function, which comprises a facing layer, a heat
insulation layer is horizontally arranged below the facing layer, a
noise reduction layer is horizontally arranged below the heat
insulation layer, and the top face of the
noise reduction layer is fixedly connected with the bottom face of the heat
insulation layer. The
noise reduction layer and the heat insulation layer are wrapped by a second waterproof layer, and the second waterproof layer is wrapped by a mothproof frame. According to the color steel composite board, the overall heat insulation effect of the color steel composite board is improved by arranging the heat insulation layer made of a
sodium-based heat insulation soft felt material, meanwhile, the
noise reduction layer is arranged below the color steel composite board, the sound insulation effect is improved, and meanwhile the heat insulation capacity is further improved through a
noise reduction cavity in the
noise reduction layer; the heat insulation layer and the noise reduction layer are protected through the double waterproof structures, the sound insulation and heat insulation effects of the device are durable, meanwhile, the mothproof frame is arranged between the first waterproof layer and the second waterproof layer, worm
erosion can be effectively prevented, and the service life of the device is prolonged.