Low-fault prepayment electricity meter

The utility model discloses a low-fault prepayment electricity meter, which comprises an electricity meter shell, a mutual inductor, a relay and a circuit board, and is characterized in that the electricity meter shell comprises a base shell and an upper cover shell; the end twisting box is detachably arranged at the left side end in the base shell, a plurality of wiring cavities are formed in the end twisting box, and a wiring frame is arranged in each wiring cavity; the terminal torsion box is provided with a plurality of wiring screws which are matched with the corresponding wiring frames respectively, and is also provided with a plurality of wiring holes which are communicated with the corresponding wiring cavities respectively; the pin seat is arranged in the base shell and abuts against the right side of the end twisting box, and a plurality of pin grooves are formed in the pin seat; an input pin and an output pin of the relay penetrate through the pin grooves and extend into the corresponding wiring fr