Abstract: Objective To investigate the status and influencing factors of breastfeeding behavior of 6-month-old infants in Dazu District, Chongqing. Methods All community vaccination sites in Dazu District of Chongqing were coded, and then divided into four regions according to the East, South, West and North. One community vaccination site was randomly selected in each region as the survey site. The mothers of 6-month-old infants who entered the vaccination site were investigated by chance method during the survey period. Descriptive epidemiological analysis method was used to analyze the status of infant feeding, and univariate and multivariate analysis methods were used to analyze the influencing factors of breastfeeding. Results In this study, a total of 1 344 mothers of 6-month-old infants were surveyed, aged 23-46 years old, among which 23.21% were ≥35 years old. The breastfeeding rate, mixed feeding rate and artificial feeding rate were 77.68%, 15.63% and 6.70% respectively at the age of 1 month, 71.43%, 20.54% and 8.04% respectively at the age of 2 months, 63.84%, 25.89% and 10.27% at the age of 4 months and 53.57%, 28.57% and 17.86% respectively at the age of 6 months. There was significant difference in feeding patterns among infants of different months （P<0.01）. Unconditional multivariate Logistic regression analysis showed that mothers with postpartum milk opening time ≥ 2 h （OR=0.638） were less likely to breastfeed, and mothers with sufficient milk secretion （OR=2.418）, prenatal breastfeeding guidance （OR=1.621）, confidence in breastfeeding （OR=1.461） and high cognitive level of breastfeeding （OR=1.733） were more likely to breastfeed. Conclusion The breastfeeding rate of 6-month-old infants in Dazu District of Chongqing is low. With the increase of month age, the breastfeeding rate decreased gradually. Early postpartum milk opening, sufficient milk secretion, prenatal breastfeeding guidance, breastfeeding confidence and high cognitive level of breastfeeding are helpful to promote the implementation of breastfeeding.

Key words: Infant, Feeding status, Breastfeeding, Influencing factor