Using the PMS data of a precipitation process in Changchun on 5th July 2004,combined with synoptic charts,satellite cloud photographs and radar echoes,this paper comprehensively analyzes the microphysical structure features of the precipitable cloud system impacted by weakened tropical cyclone Mindulle(2004).The results show that the vertical macro-and micro-structure of precipitable stratiform clouds can be partitioned into four growth layers:near the cloud top is the nucleating and depositing layer;between-4 and-7 degree centigrade is the active growth layer of cloud drops and ice crystals;from 0 to-4 degree centigrade is the layer of solid particle aggregation and cloud drop evaporation;below the zero temperature level is the layer of rain drop coagulation and the condensation growth of cloud drops.Around the melting layer,the peak value of mean diameter,maximum diameter and peak diameter of 2D-P precipitation particle were concentratedly observed to be corresponding with radar bright band echo.It is found that density distribution function N(r)=mr^fexp(-ar+br²-cr³) is able to describe the size distributions of small cloud drops,big cloud drops and raindrops in the warm layer,and the fitted spectrum distribution is well matched with the observed one,and the fitted mean diameter,square-root diameter,number concentration,and liquid water content are also close to the observational results.