The moving average method was adopted to analyze the trend of the frequencies, strengths and annual extreme strengths witch affect tropical cyclones in China in the past 58 years. The Spearman rank correlation was adopted to conduct significance test. Then the paper predicted the future trends of frequencies, strengths and the annual extreme strengths of tropical cyclones by r/s analysis method based on fractal theory. The results show that the frequencies, strengths and annual extreme strengths witch affect tropical cyclones in China will present the trend of increase and augment. At last this paper introduced several countermeasures people adopt when they face the stronger tropical cyclones in ocean engineering.