In this work, a novel structure of dual-core photonic crystal fiber (PCF) is proposed to make the super-polarization-independent optical directional coupler, which takes not only the feasibility of optical fiber manufacturing process but also the needs of practical application into account. The introduced fluorine-doped elliptical cores with a rotation angle of 45-degree successfully realize the super-polarization-independent coupling performance of less than 0.004% in the difference between coupling ratios of two polarized lights within the effective wavelength range of 1230-1620nm. In other words, it effectively offsets the damage caused by the introduction of two cores to the structural symmetry, thereby significantly reducing the difference in the coupling ratio between the two polarization states and excellently eliminating the polarization-dependence of the dual-core PCF. In addition, compared with traditional elliptical air holes, the solid elliptical structure is easier to get under control, which significantly reduces the difficulty of manufacturing. Consequently, the novel structure is expected to be applied in the optical communication network nowadays.