The utility model provides a transmission line conducting wire icing and galloping on-line monitoring unit, relating to the power system transmission line monitoring technology. The utility model provides an on-line monitoring unit which can be in large-scale application and is integrated with functions of transmission line conducting wire icing and galloping. According to the unit, a camera is used for shooting image information of a monitored conductive wire. The data transmission of the camera with a core processing unit is realized through a serial port. A tension sensor unit is used for detecting the tension of the monitored conducting wire. An inclination angle sensor unit is used for detecting an inclination angle of the monitored conducting wire. A meteorological sensor unit is used for detecting a meteorological parameter of an environment at which the monitored conductive wire is located. The data transmission between the tension sensor unit, the inclination angle sensor unit and the meteorological sensor unit and the core processing unit is realized through a ZigBee wireless module, and the remote data transmission of the core processing unit is realized through a remote communication module which is a GPRS communication module and a CDMA communication module.