Abstract: Objective To understand the incidence pattern and epidemiological characteristics of 14 clusters or outbreaks of Norovirus infection in Haidian district of Beijing in 2016. Methods Field epidemiological survey was conducted and the data were described and analyzed with 2 test. Results Among the 14 clusters or outbreaks of Norovirus infection, 3 were caused by GⅠ virus and 11 were caused by GⅡ virus. A total of 422 cases were reported, and the attack rate ranged from 8.67% to 66.67%. Two incidence peaks occurred, one was during April-June and another during October-December. The positive rate of stool samples was 59.88% (100/167) and the positive rate of vomiting samples was 12.50% (1/8). The differences in attack rate and incidence of 5 symptoms (vomiting, diarrhea, fever, nausea and abdominal pain) among different age groups were significant. Conclusion The clusters or outbreaks of Norovirus infection mainly occurred in child care settings, primary and secondary schools and other institutions with mass staff in Haidian in 2016. The infections were mainly caused by GⅡ virus. All the age groups were affected and the preschool aged children had the highest incidence rate. Norovirus infection mainly occurred in spring, autumn and winter. The main symptoms were vomiting and diarrhea.