Objectives To investigate the characteristics of unhealthy eating behaviors of preschool children in Xi′an,and to systematically analyze the influencing factors,so as to provide basis for regulating good eating behavior and promoting reasonable diet for preschool children. Methods A total of 306 preschool children were selected in 6 community health service centers from August to December 2017,and were investigated by the Preschool Children′s Dietary Behavior Scale with high reliability and validity.The influencing factors for eating behaviors of children were analyzed by multiple linear regression method. Results The most common unhealthy eating behaviors of preschool children in Xi′an community included picky eating,active eating ability,poor eating habits and so on.There were significant differences on picky eating,poor eating habits and satiety response scores between boys and girls (t=3.650,2.024,3.707,P<0.05).The main caregivers and their educational backgrounds had significant effects on picky eating behavior of preschool children (F=3.126,P=0.026).The score of active eating ability in children whose caregivers had different health conditions was significantly different (F=5.052,P=0.007).Also,significant difference existed on the scores of picky eating behavior and bad eating habits of preschool children with different family members (t=6.442,3.515,P<0.05).Multiple linear regression method indicated that influencing factors for eating behavior of preschool children included the only child,the number of resident population in family,body mass index and education background of caregivers. Conclusion The key interventions for developing healthy eating behaviors and promoting physical and mental health include strengthening the establishment of the knowledge and the concept of health support for the caregivers,unifying parenting concept of the family members,and reducing the bad eating habits of obese/overweight children.