The work aims to prepare PE-g-MAH/PP/ kaolin composite material with PE and PP as main raw material through grafting maleic anhydride (MAH) and filling Kaolin by melt blending technology. The tensile property of composite material was studied through the electronic universal testing machine. The impact strength was analyzed by the electronic universal testing machine. The non-flame property of composite material was analyzed by horizontal vertical combustion apparatus. The grafted copolymer structure was analyzed by infrared spectroscopy. The results indicated that overall performance of PE-g-MAH/PP/kaolin composite material had best performance in terms of tensile strength, impact strength and elongation at break, when the composites were prepared with PE containing 5% MAH and PP at the ratio of 1:1 in mass, then added with modified kaolin at 15%. The tensile strength, impact strength and elongation at break were 10.925 MPa, 40.6 kJ/m2 and 89.5% respectively. The non-flame property of the composite material first rapidly increased and then slowly decreased with the addition of kaolin. The optimum addition of kaolin was 15%. Physical blending of components was realized. In conclusion, kaolin of a proper amount enhances the non-flame property of PE/PP composite material and the addition of MAH improves the compatibility of PE, PP and kaolin.