This article summarizes the ecurities IT application in China ,including the IT application and system construction of securities companies，the network system application, and the software and system security of securities company' branches;and then analyses the IT application of China from the following four aspects: the factors affecting securities IT application , the problems of Securities IT application, the globalization trend of capital market in the International stocks exchanges ,the future development trend of IT application and focuses in China securities market.The article provides relatively general reference for the practitioners of securities companies and securities IT application .