High-efficiency constant-temperature cold storage device capable of facilitating food material freshness preservation and fermentation

The utility model discloses a high-efficiency constant-temperature cold storage device capable of facilitating food material freshness preservation and fermentation. The high-efficiency constant-temperature cold storage device comprises a storehouse foundation, storehouse walls and a storehouse roof, wherein the storehouse walls are arranged around the storehouse foundation, the storehouse roof is arranged at the tops of the storehouse walls, the storehouse foundation, the storehouse walls and the storehouse roof are hermetically connected in a heat insulating way, the storehouse foundation is of a multilayer composite structure, and a temperature equalizing layer, a moisture isolating layer and a heat insulating layer are sequentially arranged from bottom to top; each storehouse wall is sequentially provided with a wall body, a heat insulating layer, a moisture isolating layer and a surface layer from outside to inside; the storehouse roof is sequentially provided with a surface layer, a moisture isolating l