Abstract: Objective This study was to analyze the epidemic characteristics of type A hepatitis，pre-diet its epidemic situation and put forward pertinent preventive and control measures to reduce the morbidity of hepatitis A．Methods Collective and yearly statistical analysis was utilized in terms of epidemic situation and population data of the whole province．Resuits Since 1994．Obvious changes had taken place in the epidemic rule of hepatitis A in Liaoning：the epidemic peak over 7-8 years and the peak in fall and winter disappeared apparently，with a peak occurring in spring currently．The onset in littoral regions and cities was higher than that of inland and countryside．The onset population dis-played a backward shift in age and the number of onsets of hepatitis A in the 15-30 year old group accounted for 70％ of the total．The composition rate of onsets of hepatitis A in viral hepatitis declined notably．It was predicted that the possibility of outbreak and epidemic of hepatitis A in Liaoning still existed．Conelusion The epidemic rule of hepatitis A seen in the past has vanished and the incidence decreases with a significant reduction of the epidemic outbreak．Still we should actively Carry out comprehensive prevention and cure measures，focusing on inoculation of hepatitis A vaccines．