The present disclosure discloses a method of recycling lead-acid battery waste into lead halide for resource utilization and purification. The method includes: subjecting a lead paste material from spent lead-acid batteries to halogenation and purification with a chemical wet process to obtain a halide, which can be used to prepare a novel photovoltaic light-emitting device. This method realizes the purpose of recycling and value-added utilization of wastes. The present disclosure provides a method for purifying a halide from a lead paste material of spent lead batteries, which has a simple process, strong operability, low energy consumption, and no production of toxic waste gas and liquid, thus achieving the purpose of energy conservation and emission reduction. Moreover, the halide is used to prepare a novel photovoltaic light-emitting device, which achieves the value-added utilization and changes the traditional lead paste recycling concept.