Using Qingdao dual-polarization CINRAD/SA data, conventional observation data and regional automatic station meteorological data, the differences of polarimetric signatures between a severe hail supercell and a heavy precipitation supercell are analyzed. The severe hail supercell occurred in Zhucheng ,Shandong Province on 16 August 2019, the heavy precipitation supercell occurred in Gaomi, Shandong Province on 3 August 2020. The results showed that the common features include Z_DR arcs on the side of the inflow in low level of storm, Z_DR rings, deep Z_DR and K_DP columns around the strong updraft regions. The major differences include the Zhucheng supercell storm have stronger maximum reflectivity factor, higher height of maximum reflectivity factor, stronger mesocyclone rotation intensity and storm top divergence intensity, but lower height of Z_DR column and K_DP column, and narrower width of Z_DR column and K_DP column. The strong mesocyclone rotation intensity and storm top divergence intensity are conducive to the overhang of storm core and the growth of hails. The wider and deeper updraft in Gaomi supercell bring the liquid or small wet ice particles with higher concentration to a higher height, which is not conducive to the growth of hails. The vertical distribution of humidity and the vertical profile of wind play a key role in the storm intensity and weather phenomenon. The Zhucheng supercell occurs under the conditions of relatively drier vertical humidity distribution and cooler wind field profile, and results in severe hails. The Gaomi supercell occurs under the conditions of relatively wetter vertical humidity distribution and relatively warmer wind field, and generates high-intensity precipitation.