Preparation method of polysaccharide compounded cosmetic essence

The invention relates to a preparation method of polysaccharide compounded cosmetic essence, the preparation method comprises the following steps: acquiring the following raw materials according to the weight ratio: beta glucan with the molecular weight Mv of 500,000-1,000,000, dextran with the molecular weight Mw of 200,000-300,000, dextran with the molecular weight Mw of 5,000-10,000, sodium dextran sulfate DSS with the molecular weight Mw of 5,000-10,000 and the balance of deionized water or purified water; uniformly mixing the beta glucan with the molecular weight Mv of 500,000-1,000,000, the dextran with the molecular weight Mw of 200,000-300,000, the dextran with the molecular weight Mw of 5,000-10,000 and the dextran sodium sulfate DSS with the molecular weight Mw of 5,000-10,000 to obtain mixed polysaccharide powder; slowly adding water into the mixed polysaccharide powder at the temperature of 50-70 DEG C, and stirring until the polysaccharide powder is completely dissolved to obtain a viscous clear