The utility model discloses a power line burglar alarm, including control processing module, control processing module's input respectively with current detection module and the power module's of system output electric connection, control processing module the output respectively with alarm module with the timing module input electric connection, the output of timing module and the input electric connection of electric current emergence module. The utility model relates to a rationally, through a series of structures, can warn to drive to lawless persons to the very first time that power line takes place to steal and leave, can also monitor personnel for the terminal with the signal transmission simultaneously, have very strong theftproof ability.