1, blood stasis is the main pathological factor of psoriasis that is difficult to heal, we must pay attention to the use of blood circulation and stasis removal methods. 2, local cupping can improve skin penetration and absorption, improve local blood circulation, facilitate the elimination of microcirculatory disorders, accelerate the fading of skin lesions, and can make the skin less sensitive to external stimuli, increase tolerance, and improve immunity. 3, cupping method through negative pressure and warmth and other stimulating effects, so that the meridian points of qi and blood can be unblocked, so that the invasion of wind, cold, damp and heat evil and stagnant blood, stagnant qi, phlegm and dampness, evil fire, turbid evil can go out, the surface and internal access, but also through the conduction of the meridian effect on the five organs, so that the five organs of qi, blood, yin and yang tend to coordinate balance. 4, modern medical research shows that the blood cupping method has the effect of stimulating blood circulation, regulating immune function, enhancing the skin’s ability to resist disease, and regulating the neuroendocrine network, communicating with the skin inside and outside, so that the skin is well nourished, thus inhibiting the process of epidermal cell proliferation and keratinization, and speeding up the recovery of skin lesions. Cupping, as a traditional Chinese medicine treatment, is used to treat plaque psoriasis, giving full play to the advantages of non-invasive and non-side effect treatment, and the technical advantages of simple, convenient, inexpensive and experimental, which can promote the thinning of the lesions of plaque psoriasis and make the lesions fade away, which is a pure green therapy.