Polydextrose is a kind of low-calorie, sugar-free, low-blood-sugar carbohydrate. It has the property of soluble dietary fiber and prebiotics.The main functions of polydextrose include suspension of solid particles, control of viscosity, expansion, creamy taste, improving the stability of microwave or heat treatment, improving the texture of the product and increasing the consistency. In low calorie food, it can replace sugar and fat in part or all. While reducing food energy, it can keep the original flavor and texture of food, so that it can arouse the interest of consumers and bring a satisfactory taste of the taste.