[目的]通过对什邡市细菌性痢疾发病时间进行聚集性分析,为有效采取防控措施提供科学依据。[方法]采用圆形分布分析法对什邡市细菌性痢疾进行时间聚集性分析。[结果]什邡市菌痢发病高峰时点为8月22日,发病高峰期为6月19日～10月26日。[结论]什邡市菌痢发病有时间上的聚集性,主要集中在夏秋季。 [Objective] To analyze the time of onset of bacterial dysentery in Shifang City and provide a scientific basis for effective prevention and control measures. [Method] The circular distribution analysis method was used to analyze the time aggregation of bacillary dysentery in Shifang City. [Results] The peak incidence of bacillary dysentery in Shifang was August 22 and the peak incidence was June 19 to October 26. [Conclusion] The incidence of bacillary dysentery in Shifang City was clustered in time, mainly in summer and autumn.