Abstract: Chinese investment banks, a part of the entire financial market,play an important role on the growth of national economy of China. With the financial market development after China entered into WTO, Chinese investment banks are confronted with the tremendous international competition. The optimized path of business constructure for Chinese investment banks is discussed. In order to enhance competitive power of Chinese investment bank, the optimized path of their business structure is constructed and impact factors in the path are analyzed. At last, some suggestions on how to optimize business constructure are given.