Abstract: Based on the mission requirements of Mars orbiting exploration, and the constraints and environmental characteristics of interplanetary transfer and flight around Mars, the main technical difficulties of Mars orbiting exploration missions were analyzed. Based on the mission requirements and functional characteristics of Tianwen-1 orbiter, key technologies and solutions for Mars orbiting exploration were summarized, which mainly include autonomous security control for Mars orbit insert, autonomous management of long solar transit, integration of measurement control and data transmission, and multiple communication rates adaptive relay communication. Then, the development history, trend and innovation of the functions and technologies of the Mars orbiting exploration platform were reviewed, including Mars-to-Earth communication rate, navigation and orbital transformation capability, structural load-carrying and propulsion system. According to the future requirements of Mars exploration, the new capabilities that the orbiting exploration platform needs to develop were analyzed. Finally, the future direction of Mars orbiting exploration was analyzed.