Objective To understand the status of breastfeeding and to explore the influencing factors among infants within six months of age in haidian neighbourhood of Haidian district of Beijing,and to provid information for consolidating and promoting the rate of breastfeeding in baby-friendly hospitals and the community. Method Retrospective analysis was used for the rate of breastfeeding and related factors of 890 cases within six months of ages,Logistic regression risk factors were analysed. Results Within 6 months,the rate of pure breastfeeding was 31.82%,the rate of partial breastfeeding and artificial feeding was 68.18%.The rate of pure breastfeeding within 6 months was in decline.Non-conditional Logistic regression analysis showed that mother′s age below 30(OR=0.70,95%CI=0.53~0.93),spontaneous labor (OR=0.63,95%CI=0.44~0.81)and part-time working(OR=0.52,95%CI=0.35~0.76) were protective factors of breastfeeding. Conclution Reducing the cesarean delivery rate,strengthening the baby-friendly creating community and participating of the whole society can increase the rate of pure breastfeeding and extend the time of pure breastfeeding.