Abstract: The friction-wear property of the testing ring,which is made of High-Chromium cast iron with different hardness and surface finish, rubbing against the testing block,which is made of Perbunan Rubber with different hardness, is presented in this paper. The relative curves are drawn of the friction coefficient vs sliding velocity between the ring and the block, and so are the wear curves of three groups of specimens on condition that different hardness is matched with different surface finish during each rubbing processing.