Abstract: The epidemic situation on several cruise ships floating at sea during the epidemic of corona virus disease 2019 in February 2020 was described, after carefully searching the relevant information via multiple sources. The distribution of time, space and population during the epidemic was discussed to explore the major factors affecting human infection risk. Such discussion on trend of the epidemic situation will help us realize the epidemic features and the impact of disposal measures on corona virus disease 2019(COVID-19) epidemic.