Based on the data from plane,radar and satellite,the structure features of a rainfall in Hebei province during 08:00 May 1,2014 to 08:00 May 2,2014 was studied.The results showed that the precipitation stratiform clouds in this weather process could approximately divided into 3 layers:2 850-4 200 m was cold-warm cloud,2 162-2 174 m was pure warm cloud and 121-265 m in the surface layer was warm cloud with low particle concentration (10¹ cm^-3).There existed obvious catalytic cloud-supply could structure before the precipitation.After the precipitation began,the higher cloud imposed catalysis effect on the lower cloud.The potential area of artificial precipitation stimulation mainly located in 3 100-4 000 m,where the intensity of corresponding radar echo was 20-30dBz and the vertical gradient of its intensity is significantly reduced.The correlation analysis of the cloud microphysical parameters at different altitudes was analyzed.According to the results,the LWC and the cloud particle concentration showed strong negative correlation with the aerosol concentration at the cloud base.The coefficient between the IWC and the cloud particle concentration was 0.434.The CCN concentration had strong positive correlation with the temperature (0.717) in the cold cloud.