A electrical plug connector includes a rotary assembly, an electrical plug assembly having a live prong assembly, a neutral prong assembly, and a ground prong assembly and capable of rotating with respect to a first predetermined axis, and a linkage portion between the rotary assembly and the electrical plug assembly for linking the live prong assembly, the neutral prong assembly, and the ground prong assembly. The linkage portion is configured to enable the live prong assembly, the neutral prong assembly, and the ground prong to rotate with respect to a first predetermined axis simultaneously.