Using the data of S-band dual-polarization Doppler weather radar in Jinan, sounding and surface meteorological stations data, as well as hail informations obtained from field surveys, a severe hailstorm affecting the middle and western Shandong province on 1 June 2020 is analyzed. The results are shown as follow. 1) The hailstorm is born in Xingtai city, Hebei province at noon on June 1st, affected by upper trough, and it continues to hail for nearly 5 hours after moving into Shandong province. The hailstorm is significantly strengthened after 17:00 BST, and the hail disaster is severe. 2) The hailstorm has an obvious characteristic of three-body scatter spike (TBSS) at typical time of hail-falling, including that the horizontal reflectivity factor (ZH) of the hail area at altitude from 1.5 to 5.5 km is greater than 65 dBZ, the differential reflectivity factor (ZDR) is mostly between -2.6~1.5 dB, correlation coefficient is mostly between 0. 80~0. 96. The large hail mostly concentrates on the left and front of the inflow from the front side of the lower layer. 3) Multi-cell storms become supercell storm around 17:00 BST, which has obvious bounded weak echo region and mesocyclone structure, and the ZDR column can indicate the location of the main updraft zone of the hailstorm. 4) The hydrometeor phase classification products have a good indication effect on the distribution and evolution of hail in the hailstorm. The intensity of hail can be estimated from the size, continuity and compactness of the hail color marker area, and the hail falling area can be prejudged according to the hail color marker at the low elevation angles.