Abstract: Malnutrition is an independent risk factor for poor prognosis in patients with chronic obstructive pulmonary disease (COPD). Early adoption of individualized nutritional support based on nutritional assessment can improve the prognosis of COPD patients. This article reviewed the current status of malnutrition, nutritional assessment, and nutritional support therapy in COPD patients, aiming to provide a reference for the nutritional management of clinical COPD patients.