Abstract: Objective To investigate the sleep status of 6-12 month infants and explore the associated factors in order to improve the sleep quality.Methods A total of 339 6-11 months healthy infants who took a routine medical examination in the department of children health care in Women and Children's Health Care & Family Planning Service Center of Feidong County were randomly choose as the subjects.The survey was conducted on the children's sleep behavior questionnaire (June-November edition) which based on the international classification of sleep disorders.Results The detection rate of infant sleep problems was 78.8%.There was no statistical difference in the detection rate of sleep problems between boy and girl (P>0.05).The difficulty of falling asleep was related to the high levels of excitement or activities before going to bed (P=0.000), and an inappropriate response to baby's movement during the night (P=0.002).The baby who awake frequently during the night was related to the reassurance before fall asleep (P=0.001), nocturnal eating (P=0.016), and the inappropriate soothing in the nighttime (P=0.000).Conclusions The detection rate of infant sleep problems in the 6-11 months in Feidong County was higher.It suggested that medical staff, especially children's health care workers, need to strengthen health education about sleep knowledge and sleep hygiene to parents, and to help babies to build normal sleep patterns in order to promot the development of infant growth and neuropsychological behavior.