Based on the precipitation data from 1961 to 2015 in Nanning city, this paper established a weighted Markov Chain prediction model by means of the mean-standard deviation method. On the basis of the model, the level eigenvalue of fuzzy set theory was combined,and the annual precipitation value of each predicted year was given quantitatively. The results showed that the model was good,the average fitting error was less than 2%. Besides, it was expected that Nanning city would be in a normal year in next two ...