Multifunctional universal serial bus (USB) data line

The utility model discloses a multifunctional universal serial bus (USB) data line which comprises a USB plug, wherein the USB plug is connected with multiple charging plugs through a data line and a data plug. The output port of the USB data line is connected with two plugs, one plug is the data plug, the other plug is the charging plug; when devices such as MP3s, mobile phones and the like are charged, only the charging plug is inserted, thereby preventing virus invasion so as not to affect the use of the mobile phone and the like; and when the device needs to transmit data, only the data plug interface is inserted.