At present，the UDICs are gradually out of the function of government financing platform，to achieve market-oriented operation of the transformation and upgrading. As a professional engaged in urban infrastructure construction market，they will play a great role in the construction of small towns. This paper mainly analyzes the role of the city investment company in the construction of the characteristic town. First of all，it can serve as the government side to fulfill the functions of the government in early stage，investment and supervision. Secondly，it can be used as the investment，construction and operation of the society to become the city infrastructure comprehensive service providers. Thirdly，relocate its function of financing according to the market-oriented operation. Finally，give suggestions on type of project for UDICs participate in.