The study of  cancer chemotherapy patients syndromes  increased year by year in China. Clinical trials revealed that most of cancer chemotherapy patients sufferred form side effects such as nausea, vomiting and decreased appetite. These symptoms leaded to thequality of life declines in cancer chemotherapy patients and can easily cause weight loss and malnutrition. Nutritional status not only influenced directly the quality of life in cancer patients with chemotherapy, but also was related closely to the treatment effect, complications and clinical outcomes. Therefore, the nutritional status of cancer chemotherapy patients has important clinical research value and significance. This article reviewed the etiology and pathogenesis of malnutrition of cancer chemotherapy patients, nutritional status of cancer chemotherapy patients in China, the impact of malnutrition on cancer chemotherapy patients, and clinical application of nutrition screening and assessment tools to attach clinical attention to the nutritional status of patients with cancer chemotherapy, and then strengthen the nutritional support therapy of such patients; To provide reference by choosing and using nutritional status screening and assessment tools in clinical practice, and to prevent the occurrence of malnutrition in patients with chemotherapy, and then to improve their nutritional status,  the quality of life of cancer chemotherapy patients, and ultimately improve the clinical outcomes of cancer chemotherapy patients.

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