Iron oxide coated sand (IOCS) was prepared in laboratory. The effects of different parameters such as aqua pH, solidification temperature and iron solution concentration on characteristics of the IOCS surface were studied, and the wearing resistance of the coating-layer was estimated by abrasion experiments. SEM reveals that such factors as the oxide layer covering sand 30～60 in thickness, solidification temperature and iron solution concentration can obviously affect the shape, component and surface potential of IOCS. Abrasion test, with intensity about G=400～600s-1, shows that coating-layer mass loss increases under the higher G value, but with the increasing wearing cycle, the coating-layer wearing mass loss gradually decreases, and the quality of the coating layer tends to become stable.