Method for reducing underground water pollution of in-situ uranium leaching ore-bearing and water-bearing stratum

The invention provides a method for reducing underground water pollution of an in-situ uranium leaching ore-bearing and water-bearing stratum. Ore-bearing and water-bearing stratum underground water is lifted to a ground surface water-gathering pond through a liquid pumping well; the ore-bearing and water-bearing stratum underground water in the water-gathering pond enters a reverse osmosis device; when the uranium concertation of concentrated water produced by the reverse osmosis device is greater than or equal to 6 mg/L, the concentrated water is discharged into a stock solution pond to serve as a reused stock solution and enters a water treatment workshop to extract uranium, the waste solution after uranium extraction enters a solution preparation pond and then returns to the ore-bearing and water-bearing stratum through an injection well. When the uranium concertation is smaller than 6 mg/L, the concentrated water is discharged into an evaporation pond to serve as abandoned water. Fresh water produced by