Abstract: The viewpoints of constructivism in social problems are first summarized. Then based on a critical review of the traditional “problemsolution model”, the theoretical framework of policy analysis of “the structurecriticism analysis model” is discussed. The current social assistance policy for problem street children in China is further reflected upon, which provides an insight into this issue and the corresponding policies and services.

Key words: constructivism, the theoretical model of policy analysis, problem street children, social assistance policy