The utility model discloses a sighting device that is used for long -range cleaing away of overhead line foreign matter laser, include with the burnt camera of perpendicular the focused length of placing of optical axis line, place at preceding light filter, the half anti - semitransparent mirror of long burnt camera camera lens of can focusing, place at terminal speculum, accurate electrical platform and the main control unit of optical axis line, the speculum is fixed in accurate electrical platform in front, the camera lens of the burnt camera of the length of can focusing is central in the face of the plane of reflection of half accurate opposite semitransparent mirror, half anti - semitransparent mirror is placed on infrared laser beam, and places with optical axis line one -tenth 45 degrees, the output number of pass of the burnt camera of the length of can focusing is according to line connection to main control unit, main control unit's output is connected to accurate electrical platform through the control line. The utility model discloses can be conveniently with remote laser facula position accurate positioning, solved since laser beam to people's eye and the invisible long -range pointing problem of bringing of image acquisition equipment.