The invention discloses a novel light-filtering device. The novel light-filtering device comprises a shell, wherein the shell is provided with a light-transmitting hole; a driving motor is arranged on one side of the shell; a driving shaft of the driving motor extends to the other side of the shell; a first optical filter and a second optical filter are arranged on the other side of the shell; the driving shaft of the driving motor is fixed with one end of a first swinging rod and one end of a second swinging rod at the same time; the first swinging rod and the second swinging rod are arranged crossly; the other ends of the first swinging rod and the second swinging rod are connected with the first optical filter and the second optical filter respectively. When the driving motor rotates, the first swinging rod is used for driving the first optical filter to move linearly, the second swinging rod is used for driving the second optical filter to move circumferentially, and the light-filtering portion of the first optical filter and the light-filtering portion of the second optical filter are exchanged and are matched with the light-transmitting hole in the shell respectively; the light-filtering portion of the first optical filter and the light-filtering portion of the second optical filter are the same in thicknesses. By adopting the novel light-filtering device, the diameter of the light-transmitting hole of the light-filtering device can be increased, the non-confocal phenomenon of a lens is avoided, the shooting quality is improved, and the shooting range is expanded.