Chinese medicine and Western medicine have commonalities in their understanding of the etiology of diabetes, and each has its own focus. Chinese medicine attaches great importance to the role of the internal factors of the body, and “those who are soft and weak in the five organs are good at disease elimination”, which clearly points out that the occurrence of diabetes is related to the lack of Bing Fu, which is similar to the modern medical belief that diabetes is closely related to genetic factors. This has something in common with the modern medical belief that the cause of diabetes is closely related to genetic factors, and as Chinese medicine believes that a poor diet and accumulated heat can cause thirst. Modern research shows that diet therapy can reduce the burden on pancreatic β-cells, which is conducive to the recovery of β-cell function, and can also enable obese people to reduce body weight and increase the number and sensitivity of insulin receptors. The mechanism of Chinese medicine in lowering glucose may have the following aspects: promoting insulin secretion by pancreatic β-cells and inhibiting glucagon secretion; improving insulin receptor binding power and number, improving insulin receptor after-effect; inhibiting gluconeogenesis, promoting glucose utilization and delaying intestinal glucose absorption. This model draws on the strengths of Chinese and Western medicine and organically combines the diagnosis of Western medicine focusing on etiology and pathology with the diagnosis of Chinese medicine focusing on systemic physiology and pathology, so that the doctor has a more comprehensive understanding of the whole condition. It is also possible to make Western medicine, which focuses on local and microscopic diagnosis, to become holistic and comprehensive. In the diagnosis of diabetes, the diagnostic criteria of Chinese and Western medicine are the same. The diagnosis of diabetes is divided into three types: Yin deficiency and heat, Qi and Yin deficiency, and Yin and Yang deficiency. Yin deficiency is the commonality of the three types, and is an intrinsic factor in the development of diabetes, and is the root of diabetes. Many scholars have studied the connection between the “evidence” and certain objective indicators in the classification of diabetes mellitus in Chinese medicine, and have combined macroscopic and microscopic diagnosis of the disease. They have explored the material basis of the macroscopic “zhi” in Chinese medicine and conducted research on the essence of the “zhi”, such as the relationship between the TCM classification of diabetes and insulin release, insulin counter-regulating hormones, metabolites of adrenal cortical medullary hormones, and the improvement of free radical damage. We have achieved promising results in the research of the relationship between Chinese medicine classification of diabetes and insulin release, insulin counter-regulating hormone, metabolites of adrenal cortical medullary hormone, scavenging of free radical damage, improving insulin resistance, etc., as well as the research of diabetic stasis of blood, and established “objective identification”, “quantitative diagnosis”, “standardization of symptoms The system associated with objective indexes such as “objectification of identification”, “quantification of diagnosis” and “standardization of symptoms” has brought the research on the combination of Chinese and Western medicine in diabetes diagnosis to a higher level. Through years of clinical practice, Chinese scholars have made useful explorations on the model of combining Chinese and Western medicine in the treatment of diabetes. For the first-time patients with high dryness and high blood sugar, they first apply various methods of Chinese and Western medicine (diet control, exercise, traditional Chinese medicine, chemical synthetic drugs or insulin) to control blood sugar as soon as possible; after the blood sugar is satisfactorily controlled, the focus of treatment is shifted to prevention and maximum delay of the development of various complications This treatment mode has been carried out in many places and has achieved promising results. 2, the combination of Chinese and Western medicine has greatly enriched the treatment of diabetes, significantly improving the efficacy and changing the traditional treatment concept The combination of Chinese and Western medicine in the treatment of diabetes gives full play to the respective advantages of Chinese and Western medicine. For example, Western medicine has a good effect of lowering sugar and has a fast onset of action, while Chinese medicine has a good symptom improvement and a long-lasting effect of lowering sugar, and the combination of the two can improve the efficacy and shorten the course of treatment. At a certain stage of development of diabetes, various complications may appear, which are usually irreversible and progressive, thus decreasing the quality of life of patients. In recent years, clinical and experimental studies combining Chinese and Western medicine to prevent and treat diabetic complications have developed rapidly. Studies have confirmed the presence of hemodynamic abnormalities in diabetic patients, and Chinese herbal medicine has advantages in preventing and treating diabetic hyperviscosity and microcirculatory disorders. Studies on aldose reductase inhibitors and protein non-enzymatic glycation inhibitors have also achieved promising results in the prevention and treatment of chronic complications of diabetes mellitus. In summary, the combination of Chinese and Western medicine to prevent and treat diabetes is not only clinically proven to be feasible, but also theoretically clarified by modern genetics, immunology, molecular enzymology and molecular biology. The advantages of Chinese medicine and Chinese and Western medicine in the prevention and treatment of diabetes for the benefit of the majority of diabetic patients.