The beta-nucleated polypropylene (beta-PP) and polypropylene (PP) were coextruded to form the alternating layered structure with different layer number. During the isothermal crystallization of layered samples at 130 degrees C, the high-density beta-nuclei at the two-dimensional layered interfaces between beta-PP and PP layers grew asymmetrically. In the beta-PP layer, the growth of beta-lamellae was quickly terminated by other beta-spherulites. In the PP layer, because the formation of alpha-crystals delayed, all beta-lamellae could freely grow perpendicular to the interface and finally form the beta-transcrystallinity (beta-TC) layer with about 25 mu m thickness. If the thickness of PP layer was lower than 50 mu m, PP layer would be almost occupied by beta-TC. The ordered arrangement of beta-TC led to an orientation of molecular chains of beta-TC layer parallel to the interface. With the increase of layer number, the content of beta-TC and orientation degree of layered samples increased. This paper provided a simple and effective method to prepare continuous, highly ordered and content-controlled beta-TC. As a result, the sample with high content of beta-TC exhibited good mechanical properties.