Anti-falling blocking net of drainage pipe opening

The utility model discloses an anti-falling blocking net of a drainage pipe opening, and relates to the technical field of municipal drainage equipment, the anti-falling blocking net comprises a fixed block, one side of the fixed block is fixedly connected with supporting frames, a telescopic box is arranged between the two supporting frames, one side of the telescopic box is provided with a rotating handle, and the rotating handle is connected with the fixed block. A rotating shaft is fixedly connected to one end of the rotating handle, a gear is fixedly connected to one side of the rotating shaft, a telescopic rod is arranged in the middle of the interior of the telescopic box, and one side of the telescopic rod is slidably connected with one side of the telescopic box. Through the arrangement of the telescopic rod and the hook, when drainage pipes of different sizes are installed, the rotating handle can be rotated to enable the gear to be meshed with the rack below the telescopic rod, so that the telescop