Abstract: The China Trajectory Optimization Competition (CTOCorganized by The Chinese Society of Theoretical and Applied Mechanics, has been successfully held for ten years since its initiation in 2009. With unremitting efforts during the past ten years, CTOC has become a communication platform for domestic universities and research institutions on space trajectory design and optimization research. It not only identifies research talents for space exploration, but also provides knowledge and ideas for this field. This article reviews the development history and achievements of CTOC following the timeline from 2009 to 2019, and summarizes the main features and innovations of the competition.