A anisotropic conductor with graphene nanoplatelets (GNPs) well planar aligned in PP matrix has been obtained in this work through multi-melt multi-injection molding (M3IM) which contains double shear flows to allow the product form three layers: skin layer, intermediate layer and core layer. The GNPs in the three layers was entirely planar oriented along machine direction (MD) owing to the second shear flow and confined interfaces between intermediate layer and core layer. The finely aligned structure drastically elevated in-plane thermal conductivity of intermediate layer to as high as 7.3 Wm-1K-1 and highlighted an average thermal conductive anisotropy of 21.4 under 25 wt. % GNPs loading, as well as provided a good electric conductivity of 0.03 Sm-1 in MD while made insulativity of composite remained in perpendicular direction under the same filler content. Additionally, the M3IM composite performed well in mechanical properties; one can be seen in tensile strength (40.3Mpa) and Young’s modulus (1.15GPa). In comparison of conventional injection molding, these outstanding anisotropic properties of M3IM composite should give the credit to the high orientation degree derived from second melt flow and confined interfaces, and presents a wide range of possibilities for continuously manufacturing unilateral electric conductors and electronic hotspot relief materials.