With the development of oncology nutrition,the importance of nutrition therapy in the multidisci-plinary treatment of cancer patients is gradually emerging.The incidence and degree of malnutrition was higher and more serious in cancer patients than in other patients,the accurate assessment of the nutritional status and the timely and individualized nutritional support are significant for the patients with malnutrition.This paper reviewed the current research status of nutritional screening and assessment methods in cancer patients,in order to provide references for understanding the nutritional status and carrying on reasonable nutrition therapy.