The invention provides a blanking die waste material knife assembly. The blanking die waste material knife assembly comprises an upper die trimming high knife, an upper die trimming low knife, an upper die waste material knife, a lower die knife and a lower die waste material knife; the end faces of the upper die trimming high knife and the upper die trimming low knife are both connected with theside faces of the upper die waste material knife; the lower die knife is arranged at the bottoms of the upper die trimming high knife and the upper die trimming low knife, and the lower die waste material knife is arranged on the side face of the lower die knife; and the end face of the lower die waste material knife is connected with the side face of the lower die knife, and the lower die waste material knife is arranged at the bottom of the upper die waste material knife. According to the blanking die waste material knife assembly, the upper die waste material knife is provided with a shearknife-edge and a tip stabbing part for tearing waste materials, and the shear efficiency is improved; a gap and a chamfer are arranged on the lower die waste material knife; the shear knife-edge of the upper die waste material knife is matched with the arc surface or the inclined surface of the bottom face of the upper die waste material knife to further form a tip stabbing protrusion, the waste materials can be punctured conveniently, the waste material tearing deformation degree in the shear process is reduced, secondary shear cannot occur, and the generation of scrap iron can be completelyavoided.