The invention discloses a preparation method of rose geranium essential oil microcapsules with good oxidation resistance and antibacterial properties, and belongs to the technical field of food processing. The preparation method comprises the following steps of using protein and polysaccharide as wall materials, and using rose geranium essential oil as a core material; performing high-speed shearing and high-pressure homogenizing so that the wall materials and the core material are jointly emulsified, adjusting pH, adding a curing agent, and performing a complex coacervation method so as to obtain turbid liquid of the rose geranium essential oil microcapsules; and then performing freeze drying so as to obtain the rose geranium essential oil microcapsules. The microcapsules prepared by the preparation method disclosed by the invention can load and protect the rose geranium essential oil, the stability of the rose geranium essential oil is improved, the oxidation resistance of the rose geranium essential oil is well exerted, and the rose geranium essential oil microcapsules have the effect of restraining bacteria; and besides, the preparation method disclosed by the invention is simple in technology, mild in conditions, low in cost, safe and harmless, and is suitable for various fields of foods, health-care products, cosmetics and the like.