Based on the combined detection of millimeter-wave radar (CPR) carried by CloudSat and laser radar (CALIOP) carried by CALIPSO, the physical characteristics of ice cloud in Nanjing from 2007 to 2010 were inverted,and they were compared with the detection results of millimeter-wave radar and lidar,the results shows:the trend of ice cloud changes with the increase of the first and then decreases, and the probability of occurrence in spring and summer is greater than that in autumn and winter.The height of the cloud-base is mainly distributed between 7~8 km.The height of the cloud-top is mainly distributed between 8~12 km.The maximum average values of cloud bottom and cloud top height appeared in 2009, which were 10.07 km and 11.69 km respectively.The average value decreased first, then increased and then decreased.The ice water content of ice cloud is mainly distributed in 0~0.005 0 g/m³, and its value is negatively correlated with the probability of occurrence. The average value increases first, then decreases and then increases.The effective radius of particles is mainly concentrated in 20.0~50.0μm, and the mean value gradually decreases with the year.