Abstract: With the aging of China, the prevalence of diabetes mellitus in the elderly has significantly increased, highlighting the importance of its standardized management in improving the clinical outcomes of elderly diabetic patients. In 2021, the National Center of Gerontology, Chinese Society of Geriatrics, Diabetes Professional Committee of Chinese Aging Well Association organized experts to write China's first guideline for diabetes mellitus in the elderly, namely “Guideline for the Management of Diabetes Mellitus in the Elderly in China (2021 edition)”. The Guideline emphasized the high heterogeneity of elderly diabetic patients, the need for comprehensive assessment, the adoption of stratified and individualized management strategies, and for the first time proposed the "simple treatment concept" and "de-intensified treatment strategy" for elderly diabetic patients. This guideline, providing clinicians with practical and operable clinical guidance, has not only promoted the standardized comprehensive management of elderly diabetic patients in China in all aspects and cycles, but also promoted the extensive development of clinical and basic research on elderly diabetes mellitus and related fields in China. In the past three years since the release of the guideline, evidence of evidence-based medicine in geriatric diabetes and related fields at home and abroad has been further accumulated, and new treatment concepts, new types of drugs and therapeutic technologies have emerged. The editorial committee of the guideline has updated the first edition of the guideline, further refined and optimized the pathway of glycemic management of geriatric diabetes, and compiled the "Guideline for the Management of Diabetes Mellitus in the Elderly in China (2024 edition)", with the hope of continuing to help standardize the management of Chinese elderly diabetes patients and improve their clinical outcomes.