Based on monthly and annual precipitation at 48 stations from 1957 to 2008 in Henan Province,the normality of the precipitation was analyzed by using the skewness and sharpness coefficient methods. The results show that the monthly and annual precipitation at most of the stations do not obey the normal distribution,however,their square/cube root obey the normal distribution better. For half of the stations,their original series of annual precipitation obey the normal distribution. The biggest skewness coefficient occurs in the original series,and the smallest in the cube root series,which is applicable for all stations and months. The positive bias is found in all the original series and most of the square root series,and the negative bias is found in most of the cube root series. The sharpness coefficients are all positive for the original series,which is positive or negative for square and cube root series.