Temperature-measuring bolt

The invention discloses a temperature-measuring bolt. The bolt comprises a nut and a stud, wherein the bottom part of the nut extends out of the stud; and the bolt also comprises a temperature-measuring element, the top part of the nut is provided with a counter pore, one end of the temperature-measuring element is fixed in the counter pore, and the temperature-measuring element is a wired temperature sensor or wireless temperature sensor. The temperature-measuring bolt is mounted on an electrically conductive copper bar on joints at each of the two ends of a circuit breaker, when the temperature of the electrically conductive copper bar rises, the temperature sensor converts a measured temperature signal into an electric signal and transfers or emits the electric signal to a temperature-measuring module inside or outside a power distributing cabinet, and when the measured temperature value exceeds a set safety temperature value, the temperature-measuring module gives sound and light alarms, so that maintainers can repair the copper bar in time to guarantee the normal operation of the whole power system. The temperature-measuring bolt has the advantages of simple structure, convenient maintenance and disassembly-assembly, low cost and high measurement precision.