Journal of Digital Information Management Liang Hu, Jia Zhao, Gaochao Xu, Yan Ding, Jianfeng Chu 10 5 2012 http://dline.info/fpaper/jdim/v10i5/9.pdf Cloud computing has become a hot technology. The virtualization technology, one of its core support technologies, is also developing quickly. In recent years, a lot of research and practice have been done in the virtualization field. Live virtual machine migration has drawn much attention as a representative technology of the virtualization field. This paper summarizes the research progress of live virtual machine migration technology including pre-copy, post-copy and CR/TR-Motion analyzes the future research trend.