The invention relates to a withstand voltage and error calibrating device for a metering low-voltage current transformer. The withstand voltage and error calibrating device for the metering low-voltage current transformer comprises a universal foundation platform (1), a supporting grounding module (2), a secondary wiring module (3), a primary guide clamping module (4) and a center penetrating mechanism (5), wherein the center penetrating mechanism (5) is arranged on the upper surface of the universal foundation platform (1), the secondary wiring module (3) is erected on the two sides of the center penetrating mechanism (5), the supporting grounding module (2) is arranged on the secondary wiring module (3), and the primary guide clamping module (4) is arranged on the upper surface of the universal foundation platform (1) and located beside the center penetrating mechanism (5). Compared with the prior art, the withstand voltage and error calibrating device for the metering low-voltage current transformer has the advantages of being simple in structure, flexible, reliable, high in universality and the like.