Snow melting car and heat insulation box thereof

The invention discloses a snow melting car and a heat insulation box thereof. The heat insulation box comprises a heat insulation box body frame, a side door which is arranged on at least one side surface of the box body frame, and a sealing plate which is arranged on other parts out of the side door, wherein a door frame for mounting the side door is arranged on the box body frame; a sealing structure is arranged between the door frame and the side door. According to the heat insulation box, the integrated heat insulation box is improved into an assembled heat insulation box; when the heat insulation box is to be subjected to heat insulation, the side door is closed to form a closed environment, so that the heat insulation effect the same as the integrated box body can be ensured; when repairing is to be carried out, the side door can be opened without being influenced by heat insulation layer materials at other parts, and the position to be repaired in the box body can be directly arrived, so that the probl