Nano-silver lipid dispersion liquid and preparation method thereof

The invention provides a preparation method of nano-silver lipid dispersion liquid. The preparation method comprises the following steps: adding polyhydric alcohol into a silver nitrate solution and then adjusting the temperature to 20-25 DEG C; dissolving sodium hydroxide into water and then sequentially adding PVP powder and a regulator and then adjusting the temperature to 20-25 DEG C; dissolving polysaccharide into water, carrying out stirring and then adjusting the temperature to 20-25 DEG C; mixing a first solution with a second solution and carrying out stirring for 10-20 minutes and then adding a third solution; keeping stirring for 10-20 minutes and then carrying out gradient heating; cooling nano-silver liquid to room temperature and then carrying out washing under the pressure of 0.2-0.6 Mpa; carrying out concentration and centrifugation treatment on the nano-silver liquid; dispersing paste nano-silver into an organic solvent to obtain paste nano-silver dispersion liquid and then carrying out ultra