The statistical value distribution and characteristic value of the pattern of precipitation enhancement were studied by using the statistic numerical modeling method.The results indicate that the statistical value of precipitation enhancement effect submits to normal distribution (the probability of normal fitting>0.70);the average of precipitation enhancement effect statistical value is correlative closely with precipitation enhancement effect (r>0.99,α<0.001),the equation of monadic linear regression is significant,the fiducial probability exceeds 99%.Therefore the precipitation enhancement effect can be calculated by way of the statistical value of statistics precipitation enhancement effect.