Abstract: Objective: To analyze the prevalence of notifiable diseases in a tumor Hospital from 2010 to 2011,and provide basis for notifiable diseases' prevention and control.Methods: The report data of notifiable infectious diseases in 2011 was described,and compared with 2010 report.Results: Nine species including 3 719 cases of notifiable diseases were reported in the hospital in 2011.There were no A class infectious diseases;6 species,3 704 cases of B infectious diseases,which accounting for 99.60%;3 species,15 cases of C infectious diseases,which accounting for 0.40%.Compared with 2010,the variety of infectious diseases was not changed in 2011,and the number of cases was reduced 123 cases,there were statistical difference on infectious diseases constitute between the two years(P<0.05).The top three reported cases of notifiable diseases in 2011 were viral hepatitis,tuberculosis and syphilis respectively,and viral hepatitis was the most which accouting for 90.47%.The number of reported infectious diseases cases in January and March was more,which accounting for 13.50% and 11.37% respectively,while in September and October was less,accounting for 5.46% and 4.22%;The constitute ratio of major infectious diseases showed an increasing trend after the first reduction.Conclusions: Viral hepatitis is a major infectious disease in hospital,it is necessary to strengthen monitoring and control.