Preparation of polymer composites is one of the important methods to realize high performance of polymer materials. In this paper, a newly developed ethylene-octene copolymer (EOC), catalyzed by metallocene catalysts, was used as an impact modifier for PP instead of traditional modifier (EPDM). The relationship between the structure and properties of polypropylene composites toughened and reinforced by EOC and CaCOs respectively or together was studied systematically. Deep investigation and analy...