Trehalose is a non-reducing disaccharide formed by two glucose molecules linked by α, α-1,1 bonds. It is a safe and reliable natural sugar with excellent properties of maintaining cell viability and biological macromolecular activity. It is known as the "sugar of life" in the scientific community. The sweetness is 45% of that of granulated sugar, and the sweetness is moderate. It can be used as a unique food ingredient that prevents food deterioration, inhibits the deterioration of nutrients, maintains the fresh flavor of food, and improves food quality, greatly expanding the function of trehalose as a natural edible sweet sugar.