A double-layer mask component includes a first mask, a first mask frame, a second mask and a second mask frame. The first mask is fixed on the first mask frame, and a first clamping portion is provided within a region which is located on a surface of the first mask frame with the first mask fixed thereon and not covered by the first mask. The second mask is fixed on the second mask frame, and a second clamping portion is provided within a region which is located on a surface of the second mask frame with the second mask fixed thereon and not covered by the second mask. The surface of the first mask frame and the surface of the second mask frame are arranged in opposite, and the first clamping portion and the second clamping portion are clamped, so that the first mask fits with the second mask.