EMC debugging data line

The utility model discloses an EMC debugging data line, which comprises a debugging circuit board, a first interface and a second interface, the debugging circuit board is provided with a replaceable radiation suppression module, a power supply filtering module, a common mode filtering module, a voltage division module, a signal filtering module and a voltage protection module, the radiation suppression module is connected in series with the first interface, and the first interface is connected in series with the common mode filtering module. The power supply filtering module, the first voltage protection module and the second interface are respectively connected in series with the radiation suppression module; the common-mode filtering module is connected with the first interface in series, the first voltage dividing module and the second voltage dividing module are respectively connected with the common-mode filtering module in series, the first signal filtering module is connected with the first voltage di