The technological status in quo of Chinese large and medium-sized corporations is investigated by analyzing the affecting factors of their R&D investment. The four factors concerning international trade, Foreign Direct Investment (FDI), R&D investment of the government, and the total size of corporations are identified. At first, the instability of parameters and validity of model are checked, and then regression analysis is carried out. By analyzing the technological status in quo, other technical indicators are also applied in combination with regression results. The results show that the technological gap between Chinese corporations and the international level is still notable, besides the Chinese corporations per se have also been greatly polarized in technical levels. The first imperative for most Chinese corporations is building up their R&D system and cultivating their learning capability.