目的　了解163 例住院腹泻患儿的173 份粪便标本中星状病毒感染情况。　方法　应用酶联免疫吸附试验方法(ELISA) 进行星状病毒抗原检测。　结果　163 例患儿星状病毒抗原阳性检出率为9 .2 % ,感染主要在秋冬季。患儿多为1 岁以内婴幼儿。　结论　该研究提示,星状病毒感染可能是北京地区秋冬季婴幼儿腹泻的重要病因之一 Objective To investigate the status of astrovirus infection in 173 stool specimens from 163 children with in-hospital diarrhea. Methods Enzyme-linked immunosorbent assay (ELISA) was used to detect astrovirus antigen. Results The positive rate of astrovirus antigen in 163 children was 9.2%. The infection was mainly in autumn and winter. Mostly infants and children less than 1 year old. Conclusions The study suggests that astrovirus infection may be one of the important causes of infant diarrhea in autumn and winter in Beijing