The invention provides a preparation method of a cacumen biotae extract, a related product and application, and belongs to the technical field of daily chemicals. The preparation method comprises the following steps: S1, mixing cacumen biotae with water, carrying out circulating
percolation extraction, and combining filtrate to obtain cacumen biotae circulating percolate and
medicine residues; s2, the cacumen biotae circulating
leachate obtained in the step S1 is subjected to filter membrane concentration, concentration and
filtration, and cacumen biotae concentrated filtrate is obtained; s3, carrying out reduced pressure
distillation and concentration on the cacumen biotae concentrated filtrate obtained in the step S2, and synchronously collecting a concentrated solution and a condensate obtained by reduced pressure
distillation; s4, cooling the concentrated solution obtained in the step S3, mixing the concentrated solution with an
ethanol water solution to obtain a
mixed solution, cooling, standing, filtering, filtering with a molecular
entrapment membrane, concentrating and
drying to obtain a cacumen biotae extract; s5, the
medicine residues obtained in the step S1 are ground into thick liquid, and the
platycladus orientalis thick liquid is obtained. The cacumen biotae extract prepared by the method can be compatible with different daily chemical product systems, and has a good effect of regulating and controlling
skin water-oil balance.