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根据中国历代灾害性海潮史料,运用一般统计方法和分形理论对其时间序列进行了分析.不仅探讨了历代灾害性海潮随时间演进的频率变化特征,而且判定了灾害性海潮时间序列的分形性质;在此基础上,还深入讨论了其分线与历代灾害性海潮累积发生次数和累积发生频率之间的关系,以及分维随时间演进的变化趋势.“,”Based on the fractal and statistical analyses of tide disasters in the history of China, the characteristics of time series of tide disasters are discussed. The characteristics of frequency changes of hazardous tides with time are anaIyzed and the fractal characteristics of the time series of tide disaster determined. Further more, the fractal dimension of the time series of tide disasters, the correlation between fractal dimensions and accumulating number or accumulating frequencies of hazardous tides, and changes of fractal dimension with time are also discussed.