Abstract:Using the data observed by the Parsivel laser precipitation Particle Spectrometer and S-band Doppler Weather Radar in a precipitation,compared echo intensity observed by Parsivel and radar,the results showed that:the two results have a good consistency, the radar observed have underestimated the echo intensity, and with echo intensity increase, the underestimation was more obvious, After amended, the estimated precipitation by Z-I relationship was more closely to Parsivel measured,it enhanced the accuracy of precipitation estimated by Doppler radar.