Based on the observations of raindrop spectra of stratiform-cloud precipitation during October 17—20,2002 in Henan Province,the distribution of raindrop size,microphysics parameters and its fluctuation features in different sites are analyzed,and it is found that the relation between Z and I in this process is 98.4I⁰⁸ and the distribution of raindrop spectra is basically in accord with M-P distribution.