Power line overheat indicator made of shape memory alloy

The utility model relates to a power line overheat indicator made of shape memory alloy. The indicator comprises a temperature-sensitive component body and an installation fixing part connected to the temperature-sensitive component body. The temperature-sensitive component body comprises a casing, an SMA spring and an indicating block, wherein the casing is of a hollow cylindrical structure whose upper end is open, the SMA spring and the indicating block are mounted in the casing, and the indicating block presses the SMA spring. Overheat of the power line is automatically monitored by utilizing the shape memory effect of the shape memory alloy; the defects that a traditional handheld infrared detection gun in the point-by-point temperature measurement mode is low in working efficiency, blind points exist, and the accuracy is controlled by human facts are overcome; and the indicator is conducive to automatic and intelligent construction of the power grid, and can effectively prompt the development of intelligent power grid.