The present invention relates to an anti-corrosion protective device of a disconnection switch connecting rod rotating part. The device comprises a first installation plate and a second installation plate installed on the switch connecting rod, and a bar-type cover configured to shield the rotating part; the bar-type cover is fixed on the first installation plate and the installation plate; the first installation plate and the installation plate are provided with holes for holding installation pieces; and the bar-type cover is an inverted U-shaped, and the side wall of the bar-type cover is inclined to 5-8 degrees inwards the bar-type cover. The anti-corrosion protective device of the disconnection switch connecting rod rotating part can be reliably fixed at the disconnection switch connecting rod rotating part and cannot be fell off in operation; and moreover, the anti-corrosion protective device of the disconnection switch connecting rod rotating part can effectively protecting the connecting rod rotating part from being exposed to the sun and rain to delay the corrosion and aging rate and prolong the operation life.