Abstract: The centralized traffic control system of Chinese high-speed railway has reached a high level of informatization and integration, which is the key support for efficient dispatch command of high-speed railway and orderly train operation. However, the level of its intelligence is still not high and there are some limitations such as low efficiency of train operation plan adjustment, excessive reliance on artificial operation in the normal circumstances, slow emergency response, difficulties in coordination of train operations and shunting operations. In view of the practical requirements of Chinese high-speed railway train operation dispatch and command, the conception of the intelligent centralized traffic control system for Chinese high-speed railway is proposed. By building a big data sharing platform of high-speed railway train operation, information sharing and business collaboration among specialty departments can be realized. The adjustment of train operation plan can be automatically completed by computer and execution simulation and analysis of train diagram can also be realized and intelligent safety control of train and shunting routes. Besides, relevant key technologies are also discussed, such as information sharing and intelligent analysis based on the Internet of Things, big data and cloud computing, coordination and optimization of train operation plan, execution simulation and analysis of train diagram, self-recovery and self-adaptation mechanism under common-track operation of trains of different classes, intelligent coordination of train dispatch based on trusted dynamic perception, in order to promote the intelligentization of the centralized traffic control system of Chinese high-speed railway.