Therefore, tumor patients often suffer from fatigue, dry throat, dry mouth, hot and bothered heart, tinnitus, dizziness, weakness of waist and knees, night sweating, deficiency of liver and kidney yin, which affects the quality of life of patients and even interrupt radiotherapy. Dendrobium is sweet and light, slightly salty, cold in nature, enters the stomach and kidney meridian, non-toxic, the Shen Nong Ben Cao Jing says that Dendrobium can “nourish the five organs, strengthen Yin, take it for a long time to thicken the intestines and stomach, lighten the body and prolong the life”; Li Shizhen in the Compendium of Materia Medica says that it has “strengthen Yin and benefit essence, thicken the intestines and stomach, nourish the internal deficiency, calm the stomach gas, grow muscles, fix the will and remove the fright, lighten the body and prolong the life. Li Shizhen said in “The Compendium of Materia Medica” that it has the miraculous effect of “strengthening yin, benefiting essence, thickening intestines and stomach, tonifying internal deficiency, pacifying stomach qi, growing muscles, fixing will and removing fright, lightening body and prolonging life”. Fresh dendrobium mainly contains polysaccharides, alkaloids, a variety of essential trace elements and amino acids, in addition to ketones, esters, phenols, alcohols, etc. It nourishes Yin and clears heat, generates fluid and moistens dryness, chews without dregs, tastes rich and fatty, both clear and tonic, tonic but not greasy, clear and does not hurt the spleen and stomach, and is the best choice for anti-radiation. Some patients know the efficacy of Dendrobium iron, but they are not familiar with the best usage. Often, they take Dendrobium ironbark products or powder Dendrobium ironbark (dried product) with American ginseng, although both have effects, the former is more expensive and the latter is difficult to bring out the best medicinal effects. The most difficult to grasp is that in the process of deep processing of Dendrobium, some unscrupulous businessmen take the second best as the best, and participate in other materials and destroy the active ingredients, which makes it difficult for patients to identify the quality of Dendrobium. The quality of fresh Dendrobium can be roughly judged by chewing it directly, and the therapeutic effect is also better than that of Dendrobium made into dried products. This is the discussion in our current Chinese medicine university textbook “Traditional Chinese Medicine”. It is difficult to dissolve the active ingredients of dried Dendrobium in water, so it needs to be cooked for a long time in a wide soup. The fresh Dendrobium can be easily absorbed by human body, and it can be chewed, juiced and boiled in soup.