The invention discloses a clearing device for insulator surface aged room temperature vulcanized silicone rubber (RTV) coatings. The clearing device comprises a plurality of scraping heads, a circular bottom plate, an annular thickness control board, a spindle, a spring, a guide rod set, a coupling, a motor spindle, a DC motor, a pull rod, a hinge, a rocker, a handle, a control switch and a DC power source. The scraping heads are evenly arranged on the circular bottom plate which is fixedly connected with the spindle. The annular thickness control board is arranged on the periphery of the circular bottom plate. The back face of the annular thickness control board is fixedly connected with the guide rod set which is connected to the spindle in a sleeving mode, and the periphery of the guide rod set is sleeved with the spring. The guide rod set is connected with the handle through the pull rod, the hinge and the rocker, and therefore a four-bar linkage mechanism is formed, and the guide rod set is controlled to stretch through the handle. According to the clearing device for the insulator surface aged RTV coatings, the thickness and the scraping force in the scraping process are controlled in a spring compressed mode; small-displacement control over the spring compression process is realized through the four-bar linkage mechanism; the clearing device is in good contact with the surface of an insulator, and aged RTV can be favorably cleared away.