Serial communication interface and electricity meter

The utility model provides a serial communication interface and an electricity meter. The serial communication interface comprises a receiving level conversion circuit and a transmitting level conversion circuit, wherein the first receiving end of the receiving level conversion circuit is connected with the electric meter system, and the transmitting end of the receiving level conversion circuit is connected with the communication system; the receiving end of the transmitting level conversion circuit is connected with the communication system, and the transmitting end of the transmitting level conversion circuit is connected with the electric meter system; and the receiving level conversion circuit and the sending level conversion circuit are used for performing level matching when the electric meter system communicates with the communication system. According to the utility model, level conversion of serial port communication of different systems can be realized, and data distortion is avoided. 本实用新型提供了一种串口通