目的对巴彦淖尔市麻疹疫苗查漏补种活动进行现场调查、评估,并对麻疹专病专报系统进行分析。方法所有8月龄~14岁未接种或未全程免疫麻疹疫苗的儿童一律免费接种1剂麻疹疫苗。结果本次应种儿童10 043人,实种儿童9 899人,接种率为98.6%,分年龄组调查和报告接种率均在95%以上。结论有计划地进行麻疹疫苗查漏补种和加强麻疹疫苗基础免疫是降低麻疹发病率和消除麻疹的重要措施。 Objective To investigate and evaluate the leak detection and replanting of measles vaccine in Bayannao’er municipality and to analyze the reporting system of measles special disease. Methods All children aged 8 months to 14 years without vaccination or full immunization were given 1 dose of measles vaccine free of charge. Results This time there were 10 043 children and 9 899 real-life children. The inoculation rate was 98.6%. Surveillance and reporting coverage by age group were above 95%. Conclusion It is an important measure to reduce the incidence of measles and eradicate measles through planned leak detection and measles vaccination and strengthening of basic measles vaccine immunization.