Abstract: The traditional residual child welfare has failed to solve the current problem of vulnerable children due to the social transformation. In comparison， the family support welfare system includes not only the welfare benefits and support services from government programs and welfare agencies， but also the informal support from communities， families and friends. It reflects the innovative concept， focusing on the positive intervention policies and professional social services. Constructing the vulnerable children family support welfare system in China means affirming “family” as the core element of system design， while providing the families with multi-level allowances， professional services and community-based supportive services from the perspective of social investment and capability building.

Key words: vulnerable child, family support, child welfare, positive welfare