Psoriasis can be treated through the use of biological agents, the principle of which is that the molecular targeting mechanism can be used to achieve more precise action sites, thus achieving the role of alleviating the condition. Biological agents are highly active immune agents extracted by genetic bioengineering technology, usually targeting drugs for a certain part of the disease-causing process, usually special antibodies, body immunity, inflammation-related molecular inhibitors, etc., which can target and remove the substances in the body that are responsible for the development of the disease, and then stop the development of the disease and improve the prognosis. Compared with traditional treatments, biologics used in the treatment of psoriasis are more precise in their action, so most patients will have better efficacy, and can effectively reduce the skin damage of psoriasis, damage to the accessory organs and joint damage, etc., and improve the quality of life of patients. If the patient exists in psoriasis, the use of biological agents for treatment, should be under the guidance of a professional dermatologist, to ensure the therapeutic effect.