Three parameter estimation methods of generalized extreme value distribution function were briefly introduced in the paper

which included the maximumlikelihood estimation

the linear moment estimation and the maximum product of spacing estimation. Two demonstration examples including monthly maximum runoff at Makou Station and daily maximum precipitation in Guangzhou over the past years were analyzed by the three parameter estimation methods of GEV distribution. The results indicated that three parameters obtained by three different estimation methods were very close. Several goodness fit tests showed that two examples were obeyed the generalized extreme value distribution. And the designed values predicted by maximum product of spacing estimation were better fitted with the measured values.