The 2017–18 World Boxing Super Series – cruiserweight division was a World Boxing Super Series professional boxing tournament that took place between September 2017 and July 2018 in several countries. The Super Series featured eight top-rated cruiserweight boxers in a single-elimination tournament. Its winner will hold world titles for all four of boxing's major sanctioning bodies, The Ring Magazine title, as well as the Muhammad Ali trophy. The tournament was organized by Comosa AG. A super middleweight tournament was held concurrently, with prize money for both competitions totalling US$50 million.