The paper focus on the Chinese OTC financial market as a whole，briefly discusses the existing problem from the current situation of business model to Internet technology application level，and then to the structure of the market system，and gives brief development proposals，especially on the ascendant block chain technology application，putting forward some opinions and suggestions. In the beginning part，a panoramic introduction is given of the existing financial OTC market，which will be helpful for readers to make their own research on the object of interest.