The invention provides a conductor insulation spraying device. The conductor insulation spraying device comprises a spraying device, a control device and a walking device. The walking device is connected with the control device and the spraying device, the walking device is provided with walking wheels which are used to run on a bare conductor; the control device is configured to supply power andcontrol signals to the walking wheels; the spraying device comprises a nozzle, a storage bin, a material injection pump, material injection ports and baffles. The spraying device performs coating of insulation materials to the bare conductor while the control device controls the walking device to run on the conductor to coat the bare conductor with a layer of insulation layer to form an insulatedconductor. In the construction process of the conductor insulation, the work of outage and conductor dismounting is not needed to shorten the construction period of the insulation processing and reduce the engineering input cost.