The utility model discloses a reservoir waterproof gate convenient to overhaul, which relates to the technical field of reservoir waterproof gates and comprises a gate body, and a moving mechanism is arranged on one side of the gate body. The moving mechanism comprises a moving part, a limiting part, a connecting part, a gear, a pull rod and teeth, a movable groove is formed in one side of the gate body, a limiting groove is formed in one side of the movable groove, and the limiting part is slidably connected into the limiting groove; according to the technical scheme, the moving mechanism is adopted, when the gear rotates, the gear can be meshed with the teeth, so that the connecting piece moves in the movable groove, the moving piece moves on one side of the gate body, and a maintainer can move on one side of the gate body along with the moving piece by holding the pull rod through the arrangement of the pull rod; and the gate body is overhauled, so that the overhauling process is more convenient, the condition of repeated overhauling is not easy to occur, and the overhauling is more time-saving and labor-saving.