The risk degree assessment of regional landslide is a research topic important to the disaster prevention and landslide alleviation. According to the data of landslides, the future landslide frequency and it strend can be forecast and the forecast can dynamically evaluate the risk degree of regional landslides. Based on the landslide data in Wanzhou of the Three Gorges Reservoir area, the time records were analyzed and the Hurst index of the different regional ranks and time extensions was st udied. The experimental relationships of the Hurst indexes for the landslide areas of M > > 1 000 m², M > > 10 000 m², and M > 100 000 m² in 1980 —1990 and 1980 —1995 were acquired respectively. According to the Hurst indexes, this method forecasted the maximum fluctuation of landslides in the future 5 years. The function relationship between time correlation and the Hurst indexes was st udied by Fractional Brownian Motion. The relationship forecasted quantitatively the development trend of regional landslides. It is showed that the frequency forecast of regional landslides can dynamically evaluate the risk degree of regional landslides.