The invention relates to a transmission line cable insulated rubber automatic wrapping device. The transmission line cable insulated rubber automatic wrapping device comprises a travelling mechanism, a lifting mechanism and a conveying wrapping mechanism, wherein the travelling mechanism mainly comprises a rubber coated pulley, and drives the pulley to roll through the power provided by a motor, thereby realizing a travelling function of the device on an overhead line; the lifting device realizes the ascending and descending of the conveying wrapping mechanism through a movable pulley and a rope, and accomplishes the connection between the travelling mechanism and the wrapping mechanism; the wrapping mechanism belongs to a core mechanism of a whole robot, and realizes the conveying and wrapping of insulated rubber through the matching of a connecting rod and a pulley. The transmission line cable insulated rubber automatic wrapping device perfectly combines mechanical devices and electromechanical control, ensures that a travelling device is separated from a lifting device, realizes lifting through cables, guarantees the operation stability and reliability, and can flexibly and independently accomplish the operation of wrapping insulated sheath for transmission lines.