Fuente: WIPO "tomato" The present disclosure belongs to the technical field of functional materials, and provided are a targeted nano-carrier, a preparation method therefor, an application thereof, a targeted drug-loaded nano-carrier, and a preparation method therefor. The targeted nano-carrier comprises a nano-carrier and a target chemically bonded on the nano-carrier, wherein the nano-carrier is nano-particles formed from an organic polymer or an inorganic material, and the target is aspartic acid or an aspartic acid derivative. The targeted nano-carrier provided by the invention can actively penetrate plant cell walls and cell membranes, is suitable for drug delivery for living plants, tissues etc., can reduce drug dosage and costs, has a protective effect on carried drugs and improves drug efficiency, prolongs the duration of drug action, reduces toxicity and contamination, and reduces the likelihood of drug resistance.