The embodiments of the present disclosure provide a data line and a driving method thereof. The data line comprises: a first port for connecting an adapter, a second port for connecting a mobile terminal, a control module, a first switch module, and a second switch module. The control module is used to, on determination that the second port is not connected to the mobile terminal, output a first pulse signal from a first pin, output a first control signal from a second pin, and output a second control signal from a third pin. The first switch module is used to transmit, under the control of the first control signal, the first pulse signal to the second port, and the second switch module is used to disconnect, under the control of the second control signal, an electrical connection between the first port and the second port.