The invention discloses an array substrate and a magneto-optical switch display. The array substrate comprises a thin film transistor, a coil connected with the thin film transistor, and a magneto-optical crystal inserted in the coil. The coil and the magneto-optical crystal form a magneto-optical switch structure. The magneto-optical switch structure can change passing rate of emergent light passing through the array substrate. The array substrate and the magneto-optical switch display can reduce response time of a display, and achieve effect of ensuring coherence of displayed images.