Abstract: Based on small body surface exploration missions carried out so far and future development trends of small body surface exploration technology, the necessity and key technologies of small body surface motion are elaborated. Firstly, the difficulties and challenges encountered in small body surface explorations are summarized. Then, thekey technologies related to the small body surface motion are outlined, and the research progress of these technnologies are surveyed. Finally, future research focuses and development trends of small body landing technologies are discussed.