Abstract: Objective This analysis was designed to understand the morbidity trend and epidemic characteristics of scarlet fever(scarlatina)in Penglai so as to find out weak points in its prevention and treatment and institute effecfive countermeasures．Methods 133 cases of scarlet fever from 1990 to 2004 in Penglai were managed epidemiological analysis according to different year，age，gender and township distribution．Results There were 3 peaks in the onset of scarlet fever from 1990 to 2004，1993, 1996 and 1999，with a ratio of 7.74/lakh，4.51/lakh and 4.52/lakh respectively；cases were primarily centered in Shizhi and the other three towns including Daxindian．Beigou and Nanwang；7 to 15 years old was a high-risk group of scarlet fever in Penglal．Conclusion There is certain periodicity in the prevalence of scarlet fever in Penglai，3-5 years on average．The key tO preventing scarlet fever is to avoid taking children to crowded public places in winter and spring before epidemics．