For the applications of winter hailstones monitoring and warning, Xiamen S-band dual-polarization radar data are used to analyze the polarization echo characteristics of hailstones in Zhangzhou City, Fujian Province, 21 December 2016. In polarimetric radar observations, hailstorm is found of having the largest horizontal reflectivity (Z_hh, 69 dBZ), the radial length of Three-body Scattering Signature (TBSS, 16 km) and the tangential distance of side-lobe echo (20 km) during the lifetime and the reflectivity hook and inflow region in low-level are obvious. The remarkable signatures of hailstones are in low differential reflectivity (Z_dr) and low specific differential phase (K_dp), whereas low ρ_hv in rain mixed with hails. The analysis shows that this hail case is not a typical supercell thunderstorm, but there are partial polarization echo features of supercell thunderstorm. Besides, a shallow region of high Z_dr is found on the Forward-Flank Downdraft (FFD), called the Z_dr "arc", extending to the middle level. The Z_dr and K_dp columns in pairs and midlevel "rings" of depressed CC are observed in the inflow region and the Rear-Flank Downdraft (RFD).