Tumors are related to a decrease in the body’s immune function, resulting in the inability to monitor and kill cancer cells. Improving anti-tumor immune function becomes the fourth treatment for tumors. Chinese medicine has been proven effective in improving the immune function of the body and has accumulated rich experience. Patients often ask which Chinese medicines can improve immune function. The following are some of the herbs that can improve immune function: Astragalus, Ginseng, Radix et Rhizoma, Atractylodes Macrocephalae, Ganoderma Lucidum, Rhizoma Polygonatum, Rhizoma Yam, Poria, Shiitake, etc. These herbs are suitable for people with Qi deficiency, such as shortage of breath, low fatigue, low food intake, loose stools, frequent sweating and urination, palpitation and insomnia, and sagging of organs. 2. It is suitable for people with blood deficiency constitution, manifested as pale face, anemia, low blood count, dizziness, palpitation and insomnia, low menstrual flow in women, infertility, low spermatozoa and infertility in men, growth retardation and premature aging in children, etc. 3. Yin tonifying herbs that can improve immune function: Dihuang, Wu Wei Zi, Cortex, Tian Dong, Mai Dong, Lady’s Mantle, Dry Lotus Grass, Xuan Shen, Wolfberry, etc. It is suitable for people with yin deficiency, manifesting as emaciation, dry mouth, dry tongue, red face, false heat and thirst, hot flashes and night sweats, red tongue with little coating, astringent and faint eyes, etc.; 4. Yang tonifying herbs that can improve immune function: Xian Ling Spleen, Boneset, Acanthopanax, Eucommia, Radix et Rhizoma, Cinnamon, etc. It is suitable for people with Yang deficiency constitution, manifested as fear of cold and warmth, pale face, cold limbs, spontaneous sweating, palpitation and panting, sore waist and knees, weakness, lazy speech, premature ejaculation, impotence, thin stools, frequent urination, etc.