Preparation method of menthol microcapsules with efficient loading and slow release effects

The invention discloses a preparation method of menthol microcapsules with efficient loading and slow release effects. The method comprises the following steps: mixing beta cyclodextrin and KOH, and fully dissolving in distilled water to prepare mother liquor; indirectly mixing volatile methanol and the mother liquor in a closed container, introducing volatile methanol gas into the mother liquor to induce beta cyclodextrin crystals to separate out, washing, grinding and sieving to obtain beta cyclodextrin crystal powder; and grinding and sieving menthol crystals, adding the beta cyclodextrin crystal powder, directly heating in the closed container, removing residual L menthol, centrifuging and drying to obtain the menthol-loaded microcapsules. According to the method, the complexing rate of menthol can be obviously improved, and compared with the traditional dextrin or starch material-loaded menthol, the complexing rate is improved from 5-7 percent to 25 percent or above; the microcapsules prepared by the met