Line self-powered alarm device capable of preventing outside force damage

The invention belongs to the field of power transmission line maintenance of an electric power system and specifically relates to a line self-powered alarm device capable of preventing outside force damage. The line self-powered alarm device comprises a power supply unit, an alarm unit and a collection unit, wherein the power supply unit is used for supplying electric energy needed for work to the alarm unit and the collection unit, the alarm unit comprises an audible-visual alarm, the collection unit comprises an infrared sensor, alarms can be sent out when scanning signals of the infrared sensor are received by the audible-visual alarm, and the power supply unit is a solar cell panel. The line self-powered alarm is suitable for mechanical construction on a site off a power transmission line, sufficient power supply can be provided for the alarm device, and offline conditions can be monitored in real time by the alarm device when the alarm device works normally. 本发明属于电力系统输电线路运维领域，尤其涉及种线路防外力破坏自供电报警器。本发明包括供电单元