Also known as sand roller mill; materials between roller wheel and roller table get grinded and abraded by the relative movement; at the same time, materials get mixed in the sand mixer. The anti-abrasion plate is applied to bottom plate of roller table and outer race of roller wheel in order to prolong the using life. Height of roller wheel to roller table can be self-adjusted so that when runs on rigid materials or on thick material layer, the roller table can be lifted automatically, by doing this the roller table can be protected effectively. It is the perfect material preparation equipment for burning-free brick, lime sand brick, cement brick, firebrick.