The utility model discloses a transmission line unmanned aerial vehicle distance -measuring device relates to the unmanned aerial vehicle distance measurement field, has solved current transmission line distance measurement device and can't carry out measuring technical problem to the regional distance of special topography. This transmission line unmanned aerial vehicle distance -measuring device includes: unmanned aerial vehicle organism, the data acquisition module who links to each other with the unmanned aerial vehicle organism and the distance measurement module that is located ground -control center, data acquisition module is used for obtaining unmanned aerial vehicle integrated information and transmission line department general configuration of the earth's surface information, with unmanned aerial vehicle integrated information and the transmission line general configuration of the earth's surface information transmission of department to distance measurement module, the distance measurement module according to unmanned aerial vehicle integrated information, transmission line department general configuration of the earth's surface information, be located the first measuring point of transmission line wire and be located the ground thing and the transmission line wire corresponds the second measuring point of position, obtains first measuring point with distance between the second measuring point. The utility model discloses be applied to transmission line unmanned aerial vehicle distance measurement.