Abstract: A novel hydrogen storage method—hydrogen stored in hydrates is introduced. Hydrogen can be stored in different hydrate structures，such as structure Ⅱ（sⅡ），structure Ⅱ（sⅡ），structure H（sH）and semi-clathrate structure，etc. Related research works are reviewed comprehensively. Although the present results for hydrogen storage in hydrates can not meet the requirement of practical application，this technology is promising. Research results from different scholars are inconsistent，therefore，this technology needs to be improved through extensive research works. Finally，three directions for future study are suggested.