Objective To develop the maternity nurse competency model,and provide references for nurse selection,training and evaluation of "family-centered" and maternal care model. MethodsUsing competency theory,and based on semi-structured interviews and "family-centered" maternal care model,the indicators of maternity nurse competency was shaped. By using Delphi method,seven experts from maternal care and management field were inquired to develop the maternity nurse competency.Results Maternity nurse competency model based on "family-centered" maternal care model included 4 dimensions such as nursing knowledge,nursing ability,intervention capability of family-centered obstetric care specialist,personal attitudes and traits,totally 29 indicators of behavioral competency. This model had expert representation and high reliability.Conclusions The maternity nurse competency model based on "family-centered" maternal care model are scientific and reliable,and it can be used as the reference standard of nurses' selection,training and assessment in "family-centered" maternal care model.