The invention provides a
hydroxytyrosol-loaded soluble microneedle as well as a preparation method and application thereof, and belongs to the technical field of biomedical materials. The microneedle comprises a substrate layer and a needle body arranged on the surface of the substrate layer, the needle body comprises 0.01%-20% of
hydroxytyrosol and 1%-10% of
hyaluronic acid, the molecular weight of the
hyaluronic acid is 100-1000 kDa, and the% is
mass percentage content w / w or
mass volume percentage content w / v. The soluble microneedle is mild and controllable in preparation process, does not need high temperature, is simple in preparation and use method, and is green, safe and
pollution-free; the matrix material is simple, no
organic solvent is used, only water is used as a
solvent and an
adhesive, and no extra cross-linking agent needs to be added; the hydrogel is good in needle forming property, good in
biocompatibility, high in safety, high in
mechanical strength, excellent in transdermal
drug delivery effect and capable of remarkably improving
skin photoaging.