Abstract: Shale oil is an important strategic resource to ensure the long-term steady oil production and production growth in China.PetroChina has made significant exploration breakthroughs in Ordos, Junggar, and Songliao basins, and has discovered shale oil with various lithofacies association types. In order to ensure the steady oil production of 2×10⁸ ton/a and improve the security of national energy supply,PetroChina strengthened its efforts in shale oil exploration and development in 2021 and achieved progress in four aspects: (1) The large-scale shale oil development has been conducted in Longdong area, and an integral shale oil demonstration zone has been established with a capacity of one million tons; (2) The construction of Xinjiang Jimsar and Daqing Gulong National Continental Shale Oil Demonstration Zones has been promoted, obtaining shale oil production capacity of up to one million tons in Jimsar area and opening a new chapter in pure type shale oil development in Gulong area; (3) Great efforts have continuously been made in new areas, and historic exploration breakthroughs have been achieved in several basins; (4) The theory, technology, and management have continuously been innovated, obtaining significant results in quality and efficiency improvement. On the whole, the exploration and development different types of shale oil are still in different stages, but there is still a gap to achieve the large-scale benefit development.