Objective Discuss the effective nursing risk management system of gynaecology and obstetrics. Method Structure the three class control system of nursing risk of the gynaecology and obstetrics that with the head nurse、nurse group leader,and charge nurse.And develop the system construction. Result Improve obviously overal quality of nurse team in gynaecology and obstetrics and improve obviously risk management ability by the construction of nursing risk three class control system. Conclusion The high quality of the control system can multilevel control risk and can maximum limit mistakes .