The invention discloses a cable duct cover plate turning device, which belongs to the technical field of cable laying. The cable duct cover plate turning device comprises a supporting cylinder, a turning shaft, a turning shaft cross bar, a pressing bar, fixed thread, a fixed handle, a fixed bar, a fixed bar clamping plate, a fixing plate and a cushion block, wherein the turning shaft is arranged inside the supporting cylinder and can rotate freely, and the upper side is provided with a section of fixed thread; the turning shaft cross bar is welded at the bottom part of the turning shaft; the turning shaft and the turning shaft cross bar are connected to be in an L shape; the pressing bar and the fixed handle are both arranged at the upper side of the supporting cylinder, the pressing bar is telescopic, and the fixed handle is welded on the supporting cylinder; the fixed bar is arranged at the upper side of the inner wall of the supporting cylinder, and the fixed bar clamping plate is welded below the fixed bar; and the fixing plate is arranged at the bottom side of the supporting cylinder, and the cushion block is arranged below the fixing plate. The working efficiency and the safety factor are improved, the number of workers is reduced, the working time is saved, happening of abrasion, bruising and crushing can be avoided, and personal safety of the workers can be effectively ensured.