Abstract: Communication satellites, as the pivotal core of satellite communication systems, are instrumental in shaping the architecture of next-generation communication networks and advancing the aerospace industry. This paper provides an overview of the current state of international communication satellite system. It systematically summarizes the technological innovations and applications of China's civil and commercial communication satellites over the past decade. Furthermore, the paper analyzes the technological gaps between China and other nations in key areas such as high-throughput satellites (HTS), direct-to-cell satellite technology, and satellite internet. A developmental framework centered on "collaborative networking, space-ground integration, and intelligent management and control" is proposed. Finally, core future directions and technologies for China's communication satellite development are identified, including multi-orbit (GEO/MEO/LEO) collaborative networking, integrated space-ground communication networks, intelligent dynamic resource management, ultra-high-capacity fully flexible communication, and highly integrated intelligent platforms. This work aims to provide strategic support for the development of China's new generation of communication satellites and the construction of an integrated space-ground communication network.

Key words: high-throughput satellite;satellite internet, direct-to-cell satellite, integrated space-ground communication network, intelligent resource management, intelligent satellite platform