Method for extracting natural chestnut polysaccharides and skin cream containing natural chestnut polysaccharides

The invention provides a method for extracting natural chestnut polysaccharides. The method includes the steps of firstly, weighing dry chestnut powder, adding an extraction solvent to perform reflux extraction, and drying to obtain crude preprocessed powder; secondly, performing ultrasonic-microwave synergic extraction to obtain a chestnut polysaccharide extracting solution; thirdly, performing vacuum concentration on the chestnut polysaccharide extracting solution, and collecting precipitates obtained through centrifuging; fourthly, performing vacuum drying to obtain the refined chestnut polysaccharide essence. A skin cream containing the natural chestnut polysaccharides comprises, by weight percentage, 0.1-8% of emulsifier, 0.1-30% of emollient, 0.1-3% of stable thickening agent, 0.01-2% of nutrition additives, 0.1-30.0% of humectant glycerin, 0.01-5% of activator ethylenediamine tetraacetic acid disodium, 0.1-5% of solubilizer isopropyl palmitate, 0.1-5% of natural chestnut polysaccharides, 0.1-5% of esse