A rapid plug-in socket for a communication power system is in a square-tube shape and comprises a front upper shell, a front lower shell and a rear shell, wherein an elongate front upper shell bulge is vertically and downwards arranged at the middle position of an upper surface of the front upper shell, an elongate front lower shell groove is vertically and upwards arranged at the middle position of a bottom surface of the front lower shell, elongate conductive pole cores are inserted into a lower part of the shell in a left-right way from a rear part to a front part, rear parts of the conductive pole cores are in square-tube shapes, front parts of the conductive pole cores are in warp tongue shapes, warp tongue type springs are supported at the bottoms of warp tongue at front ends of the conductive pole cores, and rear ends of the warp tongue type springs are fixed on an inner bottom surface of the front lower shell. The rapid plug-in socket is simple in structure and small in volume and is easy to install; with planar contact of the warp tongue type conductive pole core, minimum contact resistance can be maintained under a large current, and a surface of a contact piece can be cleaned by wiping action generated during the disconnection process; and a short-circuit accident caused by inversed connection of a positive electrode and a negative electrode during traditional connection operation is effectively prevented.