The syndrome of qi deficiency and yang debility is a common pathogenesis in the elderly patients with diabetes, promoting the occurrence and development of various diabetic complications such as angiopathy, neuropathy, and nephropathy, etc. Academician Tong Xiaolin often uses milkvetch root, Chinese angelica and epimedium herb as a prescription basis in his clinical practice of treating senile diabetes with the syndrome. Milkvetch root, known as the best herb for invigorating qi, has the nature of ascending qi and can fill qi in blood vessels, which is commonly used 24 g or 30 g. When Chinese angelica and milkvetch root are used together to promote the mutual growth of qi and blood, it can also nourish blood and promote the blood circulation to protect collaterals, with a common dosage of 15 g. Epimedium herb can warm the kidney and activate yang, and can be administered in a small dose to warm up and dissipate cold pathogens, to generate and transform qi and blood inexhaustibly, with a commonly used dosage of 9 g, and 15 g for the extreme yang deficiency. When the three herbs are used at the same time, they can impove qi, blood and yang, strengthening the effects of each other, which can both improve the "aging state" and are also of great benefit to the improvement of various diabetes complications.