Electrical equipment assembly box used in ultralow temperature environment

The utility model provides an electrical equipment assembly box used in an ultralow temperature environment. The electrical equipment assembly box comprises a box body, a box door and a temperature control device, wherein the box body comprises a housing and an inner container, a foaming heat-insulating material is filled between the housing and the inner container, and the inner surface of the inner container is provided with a heating film and a heat dissipation device; a heat-insulating material layer is arranged at the inner side of the box door, the edge on the outer side of the box door is provided with a pressing device connected with the box body, and a waterproof silica gel sealing strip is adhered to the connecting part between the box door and the box body; and the temperature control device comprises an environment temperature sensor arranged outside the box body, and an equipment temperature sensor and a controller which are arranged in the inner container, input ends of the controller are connected with the environment temperature sensor and the equipment temperature sensor, and an output end of the controller outputs control signals to control the heating film. According to the utility model, by adopting the above measures, the electrical equipment assembly box is enabled to keep the normal work of monitoring equipment in the box when in an extremely cold region, so that accurate and effective monitoring data can be obtained.