The invention discloses a carbon fiber composite core lead online monitoring system and operation maintenance device, including a pedestal, a programmable controller arranged on the pedestal, and a camera connected with the programmable controller. The pedestal is provided with a left running mechanism and a right running mechanism of the same structure. A locking deicing mechanism is arranged between the left running mechanism and the right running mechanism. The left side of the left running mechanism is provided with a foreign matter processing mechanism. The condition of the power transmission line can be observed, the foreign matter processing efficiency is high, and the effect is good.