Abstract: Ternary Attapugite/ Polypropylene/ Polycarbonate (AT/ PP/ PC) composites containing particles withcore-shell morphology were achieved via the two-step melt blending process. Under the function of shear st ress,core-shell st ructure particles with AT as the core and PP as the shell were formed in the composites. The mechanicalproperties, morphology, and impact fracture surface of the ternary composites were studied by means of the tensiletester, impact tester, TEM, SEM, etc. The result s show that high toughness could be obtained by particles in thethree component systems with core-shell st ructure, and the tensile st rength and yield st ress for the three componentcomposite are higher than those of the PP/ PC composite as a result of the incorporation of AT. Based on the SEManalysis for impact morphology, it is considered that the interfacial voiding and the reinforcement effect of AT on thedispersed phase are the main toughening mechanisms in the ternary AT/ PP/ PC composites.