The invention discloses an antiallergic nutritional shampoo, belonging to the field of daily use chemical cleaning and shampoo products. The shampoo contains the following components: a chrysanthemum morifolium extract, a folium artemisiae argyi extract, tea oil, a climbing groundsel herb extract, aloe gel, hydrolyzed milk protein, sericin peptide, sucrose ester, L-arginine, black tea-rose enzyme, deionized water and the like. The preparation method comprises the following steps: heating the components including sucrose ester, L-arginine and the like to 50-60 DEG in a water bath, and uniformly stirring so as to form a homogeneous phase fluid; and adding nutritional components including the chrysanthemum morifolium extract, the folium artemisiae argyi extract, the tea oil, the climbing groundsel herb extract, the aloe gel and the like, and uniformly stirring until the mixture is clarified, so as to obtain the product. By adding the black tea-rose enzyme into the product, the faintly acid of the shampoo is adjusted, the natural rose fragrance is preserved, and hair cuticles on a surface layer of hair are not damaged; and by adding the chrysanthemum morifolium extract, the folium artemisiae argyi extract, the tea oil, the climbing groundsel herb extract and the aloe gel, a good bacteriostatic effect can be exerted, and allergic phenomena such as tinea capitis, alopecia, dandruff and pruritus capitis can be prevented.