Fireproof cold storage door

The fireproof cold storage door comprises an edge-covering-free door leaf and a flat-edge door frame assembly, the edge-covering-free door leaf comprises an inner frame, the front side and the rear side of the inner frame are provided with a back plate and a face plate respectively, the face plate is of an open box structure, the tops of the four vertical edges of the face plate are bent inwards to form hooked edges, the periphery of the back plate is in a step shape, and the top of the back plate is provided with an opening. The edge part of the hook edge protrudes upwards, and the protrusion is inserted into the hook edge. According to the utility model, two fireproof materials, namely the ceramic fiber cotton and the magnesium oxide fireproof plate which are proper in thickness, low in heat conductivity coefficient and excellent in heat insulation performance, are compounded in the door leaf, so that the heat preservation efficiency and the A60-grade fire-resistant heat insulation performance of the refrig