Abstract: Disclosed are beta-type active zinc sulfide and a preparation method therefor. The method includes: adding an oil phase containing styrene monomers into a water phase containing a pore-forming agent, a surfactant, a Zn salt, a complexing agent, a sulfur source and a water-soluble initiator, conducting mixing and emulsification, introducing metal elements, dissolving polystyrene of microspheres prepared through reaction in tetrahydrofuran, and then conducting calcination, pickling and activation to obtain the beta-type active zinc sulfide. The zinc sulfide microspheres prepared by the present invention are beta-type, and have excellent photoelectric properties and broad application prospects.