The invention discloses a segmental type insulation centipede ladder applied to distribution network operation without power failure. The segmental type insulation centipede ladder comprises a supporting plate, a fixed plate, a base frame, supporting units and a pull ring. The supporting plate is hinged to the fixed plate. Each supporting unit comprises a supporting frame and a casing, wherein the supporting frames and the casings are vertically connected. A U-shaped groove is formed in each casing, beams are arranged on each supporting frame, beams on the base frame are connected by being clamped into the corresponding U-shaped groove, and the U-shaped groove of the last supporting unit is connected with the beams of the next supporting unit in a clamped mode. Through the novel segmental type insulation centipede ladder, the problems that the position of an insulation boom type aerial is limited, and an insulating platform cannot be erected in a place without telegraph poles are solved. The segmental type design is adopted, the segmental type insulation centipede ladder is suitable for distribution network lines with different heights and can be dismounted, and moving and conveying are very convenient. Safety performance, insulation performance, mechanical performance and stability performance are very good, and using is very convenient.