Objective To investigate the complementary feeding status of Beijing 4~12-month-old infant,and provide a scientific basis for the infant nutrition intervention. Method By using stratified cluster sampling method,431 4~12 months old infants in Beijing suburb were extracted and collected the informations of infant food supplement to make statistical analysis through questionnaires. Results All ages,formula milk was given priority to,and the add rate was higher.The formula milk was added before 4 months;ordinary milk and yogurt were add between 4~6 months.For 4~6 months old infants,the higher rate of all types of food supplement were commercially available baby cereal,eggs,egg yolk,fruit,vegetables,fruits and vegetables water.For 7~9 months and 10~12 months old infants,various complementary feeding rates were higher,but the addition rates of bacteria algae,grains,animal blood were less.The complementary feeding index of each age group were 10.85±6.21,35.37±14.08 and 26.32±5.63 respectively.Moreover,mother's cultural degree and food for the family expenses were related to the food feeding index (P≤0.05). Conclusion There are certain problems of feeding infants in Beijing suburb,and need to be further improved.