With the rapid growth of Chinese economy and the gr adually expansion of financial industry, many peopl e pay close attention to the transparency of accounting informa tion about some big enterprises. This thesis focuse d on researching the influence of transparency of accoun ting information on corporate investment efficiency . In the light of investigating the total output value about some listed companies from 2008 to 2012, people could fi nd that the transparency of accounting information greatly avoi ds over-capitalization and under-capitalization, as well as promoting the increase of corporate investment effi ciency. When there is a large amount of circulating fund, the negative correlation between transparency of accoun ting information and overcapitalization is especial ly obviously. When there is too many external finance, the negati ve correlation between transparency of accounting i nformation and under-capitalization is especially obviously. T herefore, increasing the transparency of accounting information could effectively promote the positive development of resource optimization.