Objective To investigate the infection and epidemiological characteristics of group A rotavirus (RV-A)and adenovirus in children with diarrhea in Guangzhou. Methods The colloidal gold technique was used to detect RV.A and adenovirus antigen in 2,171 stool samples from children with diarrhea in Guangzhou Women and Children′s Medical Center from January to December 2015,and the data were statistically analyzed. Results Among the 2,171 patients,the positive rate of RV-A infection was 17.96%and that of adenovirus infection 8.66%, and the co-infection rate of both virus was 3.45%. The positive rates between different genders were not significantly different(P > 0.05);the infectious time peak of RV-A was January(40.78%),followed by December(39.24%) and February(32.61%)and that of adenovirus infection was July(15.89%)and May(15.79%). The infectious peak of RV-A and adenovirus was December(7.29%),followed by January(7.01%). The peak age of infection ranged from 1y to 3y. Conclusion RV-A and adenovirus are the main pathogens of children diarrhea ,and the onset of virus infection has obvious seasonal change.