The invention discloses a terminal block and a terminal block-assisted expansion device. The terminal block comprises a terminal block insulating shell, wherein at least two fixed cavities are formed in the terminal block insulating shell; a conductive crimping frame capable of moving up and down is arranged in each fixed cavity; a conductive strip extends into a hollow cavity of each crimping frame from the lateral wall of one end of the corresponding fixed cavity; a wire jack is arranged on the lateral wall of the other end of each fixed cavity; a wire extends into the hollow cavity of each crimping frame from the corresponding wire jack and is pressed and fixed by the inner surface of the bottom surface of the corresponding crimping frame and the conductive strip; all crimping frames on the same terminal block share the same conductive strip; and the terminal block insulating shell is provided with a terminal block-assisted expansion device connection cavity at the upper part of the corresponding conductive strip. The terminal block-assisted expansion device comprises a conductive connection assembly and an expansion position; the conductive connection assembly is connected to and fixed in the terminal block-assisted expansion device connection cavity; and a wire is pressed into the expansion position, so that equipotential connection or expansion of the terminal block can be achieved.