First of all, we must make clear how big the cold storage is. 100 tons of garlic needs about 300-500 cubic meters, and a cold storage with a height of about 4 meters needs 100 square meters. The temperature of the cold storage should be-1~-3 degrees Celsius, and the humidity should be kept at 70-75%. The freezing point of garlic is -3℃. If the cold storage temperature is below -7℃, garlic will be frozen.