Objective To understand the prevalence of malnutrition among the preschool children in the suburb of Zhengzhou,analyze the realted influencing factors,and to put forward the effective control measures. Method A total of 3 042 children aged 3～7 years old were selected from 16 kindergartens in the suburb of Zhengzhou by cluster sampling method,and were investigated with questionnaire. Results The boy's prevalence rate of malnutrition was 6.03%,the girl's was 4.92%,the average prevalence rate was 5.52%.There was no significant difference between boys and girls(χ²=3.052,P>0.05).The father's body mass index (BMI) was positively correlated with the nutritional status of children.Multivariable Logistic regression analysis showed that risk factors included disease history(OR=2.064)and partial eclipse(OR=2.175),protective factors included normal birth weight(OR=0.618),breast feeding(OR=0.704),father's normal BMI(OR=0.674),parents' higher nutrition knowledge(OR=0.567),good appetite(OR=0.780),drink milk(OR=0.682). Conclusions Malnutrition prevalence rate of preschool children in the suburb of Zhengzhou is lower than that in the rural.As the result of various factors,malnutrition should take comprehensive measures of prevention.