Preparation process of light management film adopting irreversible photochromic substrate

The invention relates to a preparation process of a light management film adopting an irreversible photochromic substrate, which comprises the following steps of: A, preparing a photochromic film base film; the method comprises the following steps: a, preparing a transparent substrate into a flat transparent base film, and preparing a flat irreversible photochromic coating on the transparent base film to form a photochromic base film; or b, adding irreversible photochromic coating into the transparent substrate to prepare a flat photochromic base film; the photochromic base film in the step a or the step b is wound into a roll shape; b, manufacturing a mask plate; and C, irradiating through a photochromic device to prepare the light management film. Compared with the prior art, the irreversible photochromic coating in the photochromic base film is subjected to irreversible color change through laser irradiation in a mask plate control mode to form an interval color change matrix, so that the light propagation