Neutral density gradual change mirror capable of stepless modulation

Disclosed is a neutral density gradual change mirror capable of stepless modulation. The neutral density gradual change mirror comprises a first lens and a second lens. The first lens is a specially-produced polarized lens, and the polarization degree of the first lens gradually decreases from top to bottom and gradually disappears; the second lens is a common polarized lens, and the polarization degree of each point position on the lens is uniformly distributed; and the second lens can be rotationally arranged on a mirror base relative to the first lens. According to the utility model, the neutral density gradual change mirror can be assembled by use of a plug-in type mirror base structure and can also be assembled by use of a rotary installation type mirror base structure. After assembling, when the second lens rotates relative to the first lens, due to change of the polarization degree, as the polarization degree of the first lens gradually decreases from top to bottom and gradually disappears, conversion into change of a density (a light blocking rate) size of a lens combination from top to bottom is realized, and the neutral density gradual change mirror capable of stepless modulation is formed in such a way.