Novel cold storage insulation board

The utility model discloses a novel cold storage insulation board which comprises an insulation board body, a lower tongue-and-groove structure extending outwards is arranged on the side wall of one side of the insulation board body in the length direction, and an upper tongue-and-groove structure matched with the lower tongue-and-groove structure is arranged on the side wall of the other side of the insulation board body in the length direction. Threaded holes with internal threads are formed in the upper tongue-and-groove structures and the lower tongue-and-groove structures, every two adjacent insulation board bodies are spliced through the upper tongue-and-groove structures and the lower tongue-and-groove structures and fixedly connected through bolts arranged in the threaded holes, and nut containing grooves are formed in the tops of the upper tongue-and-groove structures. The nut containing groove is detachably provided with a nut cover capable of covering the nut containing groove. The insulation board