The present invention relates to the technical field of nanometer
selenium hydrosols, particularly to a nanometer
selenium hydrosol having
antitumor activity, a preparation method, a preservation method and applications thereof, wherein the
hydrosol at least contains nanometer
selenium with a concentration of 0.5-5.0 mmol / L, and
Coriolus versicolor polysaccharide protein with a concentration of 100.0-600.0 mg / L. The preparation method at least comprises: S01, adding a solution containing selenium ions and / or selenous ions to a
Coriolus versicolor polysaccharide protein aqueous solution; S02, adding a
reducing agent solution to the
mixed solution obtained in the step S01 in a dropwise manner, and shaking; and S03, carrying out volume metering on the product obtained after the reducing reaction, and carrying out
dialysis treatment. According to the present invention, the
hydrosol is stable at a temperature of 2-10 DEG C; and the
Coriolus versicolor polysaccharide protein has the hydrophilic hydroxyl and the hydrophilic amino, and the two groups can enhance the affinity between the nanometer selenium and the
cancer cells, and can improve the uptake on the nanometer selenium by
tumor cells so as to achieve the whole
treatment effect of medication dosage reducing,
treatment effect improving and less toxic-
side effect, such that the effective scheme is provided for the
combination chemotherapy of cancers in the clinic.