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本文用园形分布法探讨１９８９～１９９５年松花江地区流行性出血热时间分布特征。跨年度资料分析证实了其季节性高峰的存在，发病集中时点为１１月２３～２４日。流行前期为８月２５日至１０月９日；高峰期为１０月１０日至次年１月８日；流行后期为次年１月９日至２月２２日，余为间歇期。整个流行期病例占总病例的８９５８％，流行高峰期占７９８４％。这为及时采取防治措施、预防和控制本病提供了科学依据。
In this paper, the distribution pattern of epidemic hemorrhagic fever in the Songhua River area from 1989 to 1995 was explored by the method of circular distribution. Inter-annual data analysis confirmed the existence of its seasonal peak, the incidence of concentrated time point for November 23 to 24. Prevalence of August 25 to October 9; the peak from October 10 to January 8 the following year; popular late for the following January 9 to February 22, more than intermittent. The prevalence of cases accounted for 8958% of the total cases, epidemic peak accounted for 7984%. This provides a scientific basis for timely prevention and control and prevention and control of the disease.