A cross-sectional descriptive study was carried out to assess the knowledge, attitude and practice about infant feeding and weaning food among the mothers of under 2 years children. The study was conducted at M. A. G. Osmani Medical College Hospital, Sylhet period December 2015 to February 2016 by interviewing a total 100 respondents in paediatric ward by using semi-structured questionnaire. Modes of thermoregulation identified included knowledge 81% respondents were known duration of exclusive breast feeding 6 months. 75% respondents did not know about benefits of breast milk. 45% respondents known about breast feeding had contraceptive benefits, 55% respondents were did not known about breast feeding had contraceptive benefits. Modes of face washed before feeding included 80% respondents did not know and 20% respondents were known about washed the hands before feeding. 91% respondents were known started time of weaning food after 6 months. Breast milk protect child from illness 85% respondents were did not know and only 15% respondents were known. Modes of weaning food included 68% respondents given hotchpotches as a first weaning food and only 16% mothers were given cerelac as first food. 50% respondents given complementary feeding 2-3 meals/ day and 28% were given 4-5 meals/day. 78% respondents said that bottles feed safer for baby. Modes of colostrum identified included 80% respondents known about to feed the baby, 17% respondents threw it. 45% respondents were known about breast feed the baby as soon as possible soon after delivery, 27% respondents were known within half an hour.75% respondents said that other food given besides breast milk before 6 months. Finding of the study showed that 69% infant mothers had average knowledge, 23% had good knowledge & 8% had poor knowledge. Among infant mothers nearly 54% had positive attitude and 46% had very positive attitude about infant feeding and weaning.