According to Chinese medicine, the development of breast cancer is based on the deficiency of vital energy and the deterioration of internal organs, and the external evil and the internal pathological products such as phlegm, dampness and blood stasis fight with each other, resulting in qi stagnation, blood stasis, phlegm coagulation and toxicity in the breast complex. Therefore, the development of this disease is a process of deficiency causing actuality, deficiency due to actuality, and mixed deficiency and actuality. Due to the differences in the nature of external evil and the pathological products of the disease, there are different manifestations of the symptoms. Clinical treatment should be based on the general principle of combining the support of the positive with the elimination of the evil. In the early stage, it is recommended that the main treatment is to eliminate the evil and the support of the righteous; in the middle stage, it is recommended that the support of the righteous and the elimination of the evil should be balanced at the same time; in the late stage, it is recommended that the support of the righteous should be the main treatment and the elimination of the evil should be supplemented, emphasizing the support of the righteous without leaving the evil, the elimination of the evil without harming the righteous, and the combination of attack and supplementation. A large number of clinical and experimental studies have shown that the application of Chinese medicine to treat breast cancer patients with evidence-based treatment can adjust the functions of yin and yang, qi and blood, internal organs and meridians, improve the metabolism of body substances, enhance the immune function and resistance to disease, reduce the toxic side effects of radiotherapy and chemotherapy, and increase the rate of surgical resection and completion of radiotherapy. Chinese medicine therapy plays an important role in reducing recurrence and metastasis, improving the survival rate and quality of life of breast cancer patients, and prolonging the survival period. 1. Weakness of spleen and stomach Characteristics: Loss of appetite, abdominal distension after eating, yellowish complexion, depression, tiredness, lazy speech, thin phlegm, loose stools or weak bowel movements, long and clear urine. Swelling or wasting. Pale or fat tongue with teeth marks on the edge of the tongue, thin tongue coating and weak pulse. Treatment: Benefit Qi, strengthen the spleen, warm Yang and tonify the kidney. Representative formula: use Ginseng Ling Bai Zhu San or Tonifying Zhong Yi Qi Tang plus reduction. Commonly used drugs: Benefit Qi and strengthen the spleen with raw Astragalus, Radix Codonopsis, Atractylodes Macrocephala, Rhizoma Polygonatum, Poria, Coix Seed, Chen Pi, Shen Qu, Fried Wheat Germ, Fried Grain Germ, etc.; Warm Yang and tonify the kidneys with Cistanches, Cuscuta, Radix et Rhizoma Polygonatum, etc. Basic prescription: Astragalus membranaceus 30g, Radix Codonopsis pilosulae 15g, Rhizoma Atractylodis Macrocephalae (fried) 15g, Poria 15g, Rhizoma Polygonati 15g, Semen Coicis 15g, Pericarpium Citri Reticulatae 10g, Semen Quaternary (fried) 12g, Mai, Grain Bud (fried) 12g each, Semen Cuscutae 12g, Radix Achyranthes Bidentatae 12g, Herba Cistanches 12g. 1 dose daily with water decoction. Addition and subtraction: for those with loose stools or watery stools, use Astragalus membranaceus 60g, Radix Codonopsis pilosulae 30g, add Fructus Schisandrae 6-9g to stop diarrhea; for those with spleen and kidney yang deficiency, add Radix et Rhizoma Polygonatum 9-15g, Cornu Cervi Pantotrichum 9-12g, etc. to benefit the kidney and strengthen the spleen. 2, Yin deficiency and fluid deficiency Symptoms: chest pain, dizziness, dizziness, dry mouth and lips, sore throat, swollen gums, sleeplessness, constipation, short and red urine. The tongue is red without coating and the pulse is fine. Treatment: Nourishing Yin and benefiting Qi. Representative formula: use Sha Shen Mai Dong Tang, Da Yin Wan, Consistent Decoction or Zengliang Tang with addition and reduction. Commonly used drugs: Nourishing Yin can be used in the form of Sheng Di Huang, Shu Di Huang, Tian Men Dong, Mai Men Dong, Smallpox Powder, Dendrobium, Xuan Shen, Zhi Mu, Tortoise Nail, Turtle Nail, etc.; benefiting Qi can be used in the form of Dong Shen, Chen Pi, Licorice, etc. Basic prescription: Radix Rehmanniae Praeparata 12g, Radix Rehmanniae Praeparata 12g, Radix Tianmen Dong 15g, Radix Mai Men Dong 15g, Radix Zhi Mu 12g, Radix Smallpox 30g, Radix Dendrobium (Hairpin) 12g, Radix Xuan Shen 12g, Radix Codonopsis Pilosulae 15g, Radix Tortoise A (first decoction) 30g, Radix Turtle A (first decoction) 15g, Pericarpium Citri Reticulatae 10g, Radix Glycyrrhiza Uralensis 6g. 1 dose daily with water. Addition and subtraction: for those with heavy insomnia, add 9g of sour date palm, 6g of schisandra, etc. to nourish the heart and tranquilize the mind; for those with constipation, add 15g of cistanches, 30g of heshouwu, 15g of fire hemp, etc. to laxative.