Objective To understand the epidemic feature of measles in Inner Mongolia from 2004 to 2008 so as to provide scientific evidence for measles control.Methods Descriptive epidemiological analysis was conducted on the epidemiology of measles from 2004 to 2008 based on the data collected from the regular report system of infectious diseases and annual statistics of measles.Results 11 880 cases were reported in Inner Mongolia from 2004 to 2008 and the average annual incidence was 9.94/100 thousand.The incidence was 14.96/100 thousand in 2005,when the incidence was the highest.There was a difference in the incidence in different years (P