Objective To study growth development status of migrant children in Hongshan district of Wuhan city,and to provide scientific basis for promotion of their physical development. Methods Totally 752 students aged 9~12 from two primary schools in Hongshan district of Wuhan were selected by cluster sampling.Based on monitoring data from migrant children's constitution,analysis of the growth development status and comparision with the national physique survey data were carried out. Results The average height in migrant children was lower than that in national children,and differences on height in each group were statistically significant (P<0.05).The average weight of 9~10 years old boys and 9 years old girls in migrant children were lower than those in corresponding groups,and the differences were statistically significant (P<0.05).The detection rate of emaciation among migrant boys were higher than that in national boys of rural and urban,while the rate among girls were lower.The detection rates of overweight and obesity in migrant boys were close to those in national urban boys,and the rates of girls were higher.Moreover,the detection rates of emaciation,overweight and obesity were higher in migrant boys than those in migrant girls,and the gender differences in 11 aged groups existed (P<0.05). Conclusion The growth development level of urban migrant children is below the average level of national children,and malnutrition situations of migrant boys are more serious than that of migrant girls.