Abstract: Aprecipitation event on April 30,2012 occurred in hubei province was observed by using Thies Clima laser precipitation monitor(TCLMP) and raindrop spectrum data was collected.Raindrop spectrum characteristic of convective and straitform precipitation was analyzed at different stations,and then,precipitation observed between TCLMP and automatic station rain gauge were compared.The results showed that: significant differences of Dv(the mean volume diameter),Dp(the predominant diameter),Dn(the median volume diameter) existed between these two kinds of precipitation clouds;Convective precipitation raindrop spectrum for unimodal type distribution,and stratified cloud displayed bimodal type distribution characteristic;Laser raindrop spectrometer and automatic station rain gauge observed precipitation have almost the same change trend,but TCLMP measuring value is systematic relative low,and precipitation intensity is larger,the greater the measurement deviation.