Single-bridging-line self-service ticket checking machine applied to rail transit

The utility model discloses a single bridge line self-service ticket checker applied to rail transit, which comprises a left side machine body and a right side machine body, the left side machine body and the right side machine body are provided with an IO control board, a bridge line adapter board and a gate control circuit, and the bridge line adapter board and the gate control circuit are connected with the IO control board. Wherein the ticket checker IO control panel on one side is connected with a loudspeaker, an industrial personal computer and a buzzer, the ticket checker IO control panel on the other side is connected with a reader-writer, a display screen and a two-dimensional code recognizer, and the bridging line adapter plate is provided with a communication line and power line bridging line integrated socket. Communication lines of the bridging line adapter plates of the left machine body and the right machine body are connected with the power line bridging line integrated socket through a single