Abstract: Objective To investigate the nutritional anemia in infants and young children aged 6-36 months in Xi 'an and analyze the related factors of anemia,so as to provide the basis for guiding the screening and prevention of anemia in local infants and young children. Methods From January to December 2022,infants and young children aged 6-36 months who underwent physical examination in three hospitals in Xi 'an were selected for this study. The parents of infants and young children were surveyed with questionnaires and physical examination of infants and young children. The finger peripheral blood of infants and young children was collected for hemoglobin detection and micro nutritive test. The Logistic regression analysis model was used to analyze anemia related factors. Results A total of 1 890 infants and young children aged 6-36 months were enrolled,and the prevalence of nutritional anemia was 24.50% （463 cases）. Multivariate logistic regression analysis showed that age （OR=0.511）,birth weight < 2 500 g （OR=2.179）,premature infant （OR=1.788）,maternal anemia in late pregnancy （OR=1.840）,maternal education level （OR=0.739）,primary caregiver was mother （OR=0.593）,complementary food supplementation later than 6 months of age （OR=1.456）,trace element/vitamin supplementation （OR=0.116）,insufficient intake of meat and milk （OR=2.349）,and picky/partial eating （OR=2.492） were independent factors for anemia in infants and young children aged 6-36 months. Conclusions The prevalence of nutritional anemia in infants and young children aged 6-36 months in Xi 'an is high,and there are many influencing factors. It is necessary to strengthen the guidance of infant feeding,help high-risk children to establish good eating habits,improve nutritional status,comprehensively reduce the risk of nutritional anemia in infants and young children,and improve children's health.

Key words: Infants and young children, Nutritional anemia, Nutrient deficiency, Influencing factor