The present paper focuses on the regulations on private supplementary tutoring, which in China is widely called "Xiaowai Peixun." Although much previous international literature has mostly focused on tutoring in academic subjects, tutoring in non-academic ones such as piano and painting has become popular in China and is also seen as educational investment by families. To fit this context, the present paper adopts a definition of private tutoring covering tutoring in both academic and non-academic subjects. The present paper first elaborates on the development of private tutoring in China and why it should be regulated. And then it depicts a general picture about how governments have regulated private tutoring institutions and identifies the elements in regulatory framework. At last, it discusses the possible negative results and proposes two suggestions to complement regulations.