Objective To explore the content of the psychological contract of pregnant nurses and analyze the main reasons resulting in the recessive loss of pregnant nurses, in an attempt to put forward a management strategy about pregnancy nurses. Methods Totals of 30 pregnant nurses and 15 nurse managers were randomly selected and interviewed to formulate the content of the psychological contract of pregnant nurses. Thereafter, the content was perfected by Delphi method to ensure the main psychological contract factors influencing the recessive loss of the pregnancy nurses. Results The content of the psychological contract of pregnant nurses included 12 factors of management responsibility ( posts of duty, workload, working atmosphere, bonus distribution, social welfare, education and training, opportunity to display the ability, promotion opportunity, respect for dignity, caring about the daily life of pregnant nurses, psychological comfort, pregnancy health care) and 11 factors of pregnant nurses responsibility ( fulfillment of duties, abidance by rules, rigorous thinking, enthusiasm for work, professional knowledge and skills, insist on the job, acceptance to the assignment, report for sick leave, interests of the hospitals, hospital image and development with the hospital) . Conclusions This index models a useful and reliable method to assess the psychological contract of pregnant nurses and can provide a guidance to reduce the recessive loss rate of pregnant nurses.