The utility model relates to a handheld device for power transmission line inspection. The handheld device for power transmission line inspection comprises a wireless communication terminal, a barometric pressure sensor, an A/D converter, an alarming key and an alarming module, wherein the wireless communication terminal is internally provided with a processor; the input end of the A/D converter is connected with the barometric pressure sensor, and the output end of the A/D converter is connected with the processor; the alarming key is embedded into the outer wall of the wireless communication terminal; the alarming module is arranged in the wireless communication terminal, and the signal input end of the alarming module is connected with the alarming key, and the signal output end of the alarming module is connected with the processor. The handheld device for power transmission line inspection is simple in structure, is convenient to use, can determine the altitude information of the position of the used handheld device, can transmit the altitude information to a rescue part and improve the rescue efficiency.