Abstract: Objective To understand the epidemiological characteristics of mumps in Changping in Beijing and provide scientific evidence for the control and prevention of mumps. Methods Descriptive epidemiological analysis was conducted on the incidence data of mumps in Changping collected from national disease reporting information system from 2007 to 2010.. Results A total of 1196 mumps cases occurred in Changping from 2007 to 2010 with the average annual incidence of 40.59/lakh. Most cases were in age group of 2-8 years, accounting for 67.14% of the total. The incidence in age group of 5 years was highest; The area clustering of the disease was obvious, the incidences were high in townships of Huilongguan, Dongxiaokou and Beiqijia located in zone joining town and country where large number of floating population lived.. Students and children in child care settings were affected mostly, the cases among them accounted for 73.41%. The disease mainly occurred during May-August in a year. The cases in immunized people accounted for 66.05%. The differences on the occurring of fever, parotid pain, headache, bilateral parotid enlargement and complication as well as the duration of fever were significant between the cases with different immunization history. Conclusion It is necessary to strengthen the disease surveillance and improve the laboratory diagnostic capacity. Although mumps vaccine may fail to prevent the disease, the clinical symptoms can be mitigated. In addition, the further study on the efficiency of mumps vaccine should be conducted.