圆形分布法是应用于时间数据、日期数据以及其他角度资料的一种统计方法。如传染病发病日期[1],中毒与损伤发生时间[2]等。麻疹的发病有一定的季节性,分析其季节性变动规律对制定有效的防治措施有很大的参考价值。本文用圆形分布法对庐江县2004~2009年麻疹发病的季节性规律进行 Circular distribution method is a statistical method applied to time data, date data and other angles of information. Such as the date of onset of infectious diseases [1], poisoning and injury time [2] and so on. The incidence of measles has a certain seasonal, analysis of its seasonal changes in the development of effective prevention and control measures have great reference value. In this paper, the circular distribution of Lujiang County 2004-2009 measles disease seasonal patterns