Objective To investigate the effect of FLEEOX regiment on nutritional status of advanced gastric cancer patients after neoadjuvant chemotherapy. Methods Forty-eight cases of advanced gastric cancer patients from December 2010 to October 2011 in this hospital were included into. The indexes of body composition and the blood related nutritional indicators before and after neoadjuvant chemotherapy were determined. Results After neoadjuvant chemotherapy，the body weight，intracellular fluid，body mass index，protein，body fat，body cell mass，and arm circumference mildly decreased；extracellular fluid，body water content，inorganic salts，bone mineral content，non-fat group，skeletal muscle，and arm muscle circumference mildly increased，but the differences were not statistically significant （P＞0.05）. The blood albumin，prealbumin，total protein，transferrin，and lymphocytes decreased at different degrees down，but the differences were not statistically significant （P＞0.05）. Conclusion Patients have no obvious changes in nutritional status during chemotherapy of FLEEOX regiment.