This article takes the “Fivethirtyeight” website as a typical case. Through the analysis of the contents of 150 reports within two years，it examines the data journalism in emergencies from the aspects of report content，presentation form，time limit of works and data source. The study found that the “Fivethirtyeight” network’s emergency reports focused on social security issues，visual simplicity，cautious pursuit of event timeliness，emphasizing authoritative data sources. Its production characteristics include：selecting topics based on accumulated data sources；selecting visual forms for audience acceptance efficiency；and determining production cycles based on data acquisition conditions.