To study the effects of existing different modes of health education on mothers' knowledge in feeding babies and young children, 414 mothers with their babies aged 0 to 18 months were interviewed with an ad hoc questionnaire in urban and rural areas in Guangdong Province during February to April, 1995. Results revealed that the best source of mothers' nutritional knowledge was derived from a comprehensive mode of health education, the others from mass media and medical care professionals, and the last one from mothers' relatives and friends. Prenatal training course for baby feeding was one of the effective measures in nutritional education, but its effects depended on mothers' occupation and cultural level. Baby-friend hospitals played an important role in improvement of mothers' knowledge level in breast-feeding. It suggests comprehensive education channel, training course for pregnant women, baby-friend hospitals, and so on, all are major means of nutritional education for baby feeding.