【Objective】 To know the status of infant breastfeeding and complementary feeding in Nan'an district of Chongqing,and to explore the factors of breastfeeding and complementary feeding. 【Methods】 Through randomized cluster sampling,two communities were sampled.Patriarch of 0 to 12 months babies were investigated of infant feeding and factors.Non-conditional logistic regression was used to analyze factors affecting breastfeeding and complementary feeding. 【Results】 During 0~4 months,the ratio of baby breastfeeding was 76.56%.The constituent ratio of total breastfeeding was 45.63%.The main feeding ways were partial breastfeeding (52.8%) and artificial feeding (42.23%) during 4 to 6 months,and it was artificial feeding during 7 to 12 months.The complementary feeding was started from 4 months.The ratio of rice/rice cakes and purée/pulp adding separately reached the zenith in 5(84%) and 6(84.5%) month.From 7 months,ratios of porridge/noodles,broken vegetables/fruits,eggs and meat added increased gradually.Until 12 months,the ratio was about 90%.The order of complementary feeding added was rice / rice pudding,purée/pulp,chopped vegetables/fruits,egg yolk,porridge/noodles,custard and meat. 【Conclusions】 The status of infant breastfeeding needs to be improved.The situation of complementary feeding is considerable.Maternal and child health care and other related departments should propagandize breastfeeding and its importance and popularize ways of scientific feeding to raise people's awareness of breastfeeding,improving infant breastfeeding.