The invention relates to a plant composition with a function of improving an infant skin barrier and lotion of the plant composition. The plant composition is composed of the following functional raw materials of, by weight, 1-5 parts of bletilla striata, 1-3 parts of willow twig, 1-3 parts of white paeony root, 1-2 parts of oat bran and 50-500 parts of olive oil. According to the plant composition with the function of improving the infant skin barrier and the lotion of the plant composition, toxicological safety testing is conducted on the used raw materials, strict selection is conducted, using safety of the skin care product is ensured, pure natural skin care grease is adopted based on the infant skin characteristics, the skin care product is particularly suitable for infant immature skin, are safe and have no irritation to the skin through experimental verification, the effects that the skin barrier is improved, the damaged skin is repaired auxiliarily, and meanwhile the skin state can further be improved, for example, the skin elasticity and the moisture content are increased are achieved; and the component raw materials are easy to obtain, the preparation method is simple, convenient, green and safe, and the plant composition with the function of improving the infant skin barrier and the lotion of the plant composition are easy to be accepted by the crowd and have a good application prospect and a market prospect.