Maltodextrin (MD) is a powder product made with starch as the raw material through purification after liquidation of amylase, concentration and spray drying. It is a starch derivative that does not contain free starch. Maltodextrin characterized by high viscosity, strong enhancement, good solubility, instant dissolution, good carrier property, little fermentation, low moisture adsorption, no unpleasant odor, low sweetness, good digestive absorption, low calorie and low fat is one of the most ideal basic raw materials in the food industry and has been applied in an increasing number of fields, such as papermaking, daily chemical, fine chemical, pharmaceutical industry, etc.