A photo-alignment device and method

The invention provides a photo-alignment device comprising an illumination mechanism which comprises a reflection shell, an alignment light source, and a polarization mechanism. The reflection shell comprises an ellipsoid reflection shield, and two groups of reflector units; two opposite sides of the ellipsoid reflection shield and the two groups of reflector units are spliced vertically to form an inverted V shape; the alignment light source is arranged at the focus position of the ellipsoid reflection shield; the polarization mechanism is arranged below the alignment light source and comprises two groups of Brewster spectroscope units and two groups of half-wave plate units; the two groups of Brewster spectroscope units are connected to be inverted-V-shaped and are located in the reflection shell; the two groups of reflector units and the two groups of Brewster spectroscope units are corresponding to each other in a one-to-one manner; each group of the half-wave plate units is horizontally arranged to conne