Abstract: The disclosure discloses a strain of Bifidobacterium breve capable of preventing and relieving psoriasis and application thereof, belonging to the field of microbial technologies and medical technologies. The disclosure provides new uses of B. breve CCFM1078 in inhibiting the release of IL-23/Th17 axis related inflammatory factors, and relieving the psoriasis. The B. breve CCFM1078 of the disclosure can relieve the lesion skin of psoriasis-like mice, and can inhibit thickening of the skin epidermal layer, so that the IL-23 level, the IL-22 level and the IL-17 level in the skin decrease by 20.3%, 22.0% and 18.3%, respectively. The B. breve CCFM1078 has a great application prospect in the preparation of a product (such as a food, a drug or a health food) for preventing and/or treating psoriasis.