The invention provides a foreign matter removing device of an electric transmission line. The foreign matter removing device comprises a handle and a working head set, wherein the handle is made of an insulating material; a central connecting part perpendicular to the handle is arranged on the end part at one end of the handle; the central connecting part is made of metal; the outer part of the central connecting part is coated with a rubber layer; and the cross section of the central connecting part is circular; the working head set comprises a plurality of detachable working heads; a barrel-shaped sleeve joint at one end of each working head is arranged on the central connecting part in a sleeve-joint mode, and fixed by a fixing mechanism; and an arc-shaped head is arranged at the other end of each working head; a rubber inner layer is arranged on the inner surface of each sleeve joint; the fixing mechanism is a fixing bolt which penetrates through the outer wall of the sleeve joint in a radial direction; and the end part of the fixing bolt is coated with a rubber layer.