The invention provides a cable well lid. The cable well lid is simple in structure, and the connecting reliability of the well lid is improved. The cable well lid comprises a lid frame, an upper lid body, a lower lid body and an interlocking mechanism. A stepped hole gradually decreased from top to bottom is formed in the center of the lid frame. The upper lid body and the lower lid body are arranged in the stepped hole. The center lines of the upper lid body and the lower lid body are consistent with the center line of the stepped hole. The stepped hole comprises a first stepped hole body, a second stepped hole body and a third stepped hole body. The upper lid body is arranged in the first stepped hole body in a matched mode, the lower lid body is arranged in the second stepped hole body, and the diameter of the lower lid body is larger than the hole diameter of the third stepped hole. The connecting reliability of the well lid is guaranteed, and potential safety hazards are avoided.