Abstract: To explore the role of Doppler radar products in the timing and effect analysis of the artificial hail suppression operation, based on the Doppler radar products of Chenzhou, the upper-air and surface observation data, the authors analyzed a hail suppression operation in southern Hunan on March 20, 2016. The results showed that: with the coaction of upper trough eastward in 500 hPa, the middle-low level jet, the middle-low level shear line and surface mesoscale convergence line in southern Hunan, favorable dynamic, thermodynamic, vapor and unstable conditions were provided for the occurrence of the hail weather. More than 65 dBZ reflectivity factor in CR, the obvious lasting TBSS (three-body scatter spike) and side lobe echo in multiple elevation, more than 50 kg/m2 vertical integrated liquid (VIL) and so on provided an important indicator for the timing of the artificial hail suppression operation. By comparing the characteristics of storm properties, the hail echo characteristic of thunderstorm monomer (hail cloud) before operation was obvious, the hail echo of hail cloud decreased rapidly after operation, indicating the characteristics of the hail cloud changed with the operation. The comprehensive application of multiple Doppler radar products is of great importance to the timing and effect analysis of the artificial hail suppression operation.