SoyPolysaccharides is a multifunctional biochemical reagent that is non-toxic, hydrophilic and biodegradable, and is suitable for a variety of scenarios in the food industry. It can not only be used as a thickener and emulsifier in beverages, sauces and dairy products, but also as a dietary fiber component. In addition, it exhibits excellent stability in oil/water emulsion systems, especially under acidic conditions, and can effectively prevent flocculation of β-conglycinin-based emulsions.