The invention discloses a regenerated lead copper removal agent and a preparation method thereof. The regenerated lead copper removal agent comprises the following components of, in parts by mass, 60%-80% of pyrite, 1%-20% of fluorite, 5%-30% of sulfur and 1%-10% of sodium carbonate. The method comprises the following steps that the pyrite and fluorite are mixed, then the mixture is subjected to crushing, sieving, sorting, drying and cooling to meet the requirements of the particle size and the water content, wherein the drying temperature is 90-150 DEG C, and the drying time is 30-90 minutes;and the pyrite and the fluorite powder are mixed together with sulfur and sodium carbonate according to a formula to obtain a regenerated lead copper removal agent. According to the regenerated leadcopper removal agent, the specific surface area is large, the copper removal reaction efficiency can be improved, the slag amount and the slag lead content can be reduced, the lead direct yield is improved, meanwhile, SO2 is basically not generated in the reaction process, so that the problem of environmental pollution caused by SO2 emission is solved.