“…Such foreign scholars as Michael C Jensen [1] (1986),Fazzari S, Hubbard G, Petersen B [2] (1988),Stulz, Rebe M [3] (1990),Hoshi T, Kashyap A, Scharfstein D [4] (1991),Vogt S T [5] (1994),Blanchard O J, Lopez-de-Silanes F, Shleifer A [6] (1994),Lamont O, Polk C [7] (2002) explained the corporate overinvestment behaviors mainly from the perspectives of information asymmetry and financing cost, while the scholars at home such as Yang Huajun & Hu Yiming [8] (2007), Huang Benduo & Yu Shengdao [9] (2009), Wang Yanchao [10] (2009), Wang Ping & Sun Shixia [11] (2009), Xu Xiaodong & Zhang Xitian [12] (2009), Zhang Honghui & Wang Zongjun [13] (2010), Dai Deming & Wang Xiaopeng [14] (2011), and Liu Xing & Lian Jun [15] (2011) more tended to take free cash flow and equity structure as the factors influencing overinvestment. However, the scholars at home and abroad all thought the overinvestment supervising efficiency as an important aspect of measuring the improvement degree of corporate governance…”