Abstract: One of the important part for ensuring maternal and child safety is to strength maternal and child health service supervision.A comprehensive supervision system for that guarantees its implementation.However, at this stage, the work faces the problems of insufficient effectiveness of laws and regulations, insufficient professional capacity of health supervisors, and insufficient supervision of emerging issues in maternal and child health service.With the implementation of "double random" spot check model in post-event supervision, primary health supervisors are facing some difficulties with the professional tasks.Combined with the situation, Shanghai municipal health supervision department established a key control point monitoring model for maternal and child health services, improving the training efficiency of primary health supervisors, offering guidance for health supervisors, which provides useful exploration in building and reforming the maternal and child health service supervision system.