The public health system plays an important role in maintaining public health and health safety， but as the core of the public health system， the basic public health services are faced with the dilemma of “improving quality and efficiency”. The development and practice of the social network theory for many years show that social network， which involves relationship network， trust， cooperation and reciprocity in sociology， is becoming an effective method to deal with community resource constraint， lack of service motivation and lack of social participation. On the basis of reviewing the relevant research of social network theory in the field of health， this paper attempted to find the effective methods and approaches to improve the utilization effect of basic public health services by using the new idea of social network embedded in public health services， in order to further improve the construction of China’s public health system.