The invention discloses a plant essential oil microcapsule preparation capable of preventing and controlling the chigger mite disease. The plant essential oil microcapsule preparation comprises the following components in parts by weight: 2-20 parts of thymol, 1-5 parts of eugenol, 1-5 parts of methyl eugenol, 2-10 parts of carvacrol, 1-20 parts of cinnamaldehyde, 0.1-1.0 parts of sanguinarine, 0.1-1.0 parts of chelerythrine, 40-70 parts of auxiliary materials, and 30-60 parts of an emulsifier. The provided composite plant essential oil microcapsule can effectively prevent and control the chicken chigger mite, effectively inhibits the growth of other harmful bacteria, promotes the growth of beneficial bacteria, and quickly repairs lesions, so that the production and sales of bare chickensis protected from the skin disease affection caused by chigger mite.