Abstract: Using solvent formulations and double well tubes filling mining methods on the dissolving low-grade solid potash mining,dissolving-dirving expanding experimental in the Mahai salt lake deposit was carried out.Through surfer software,hydrodynamic field and hydrogeochemical fields was analyzed.Results indicated that with the changes trends of the hydrodynamic fields by adding brine processing consistent with environmental variation,mining brine pipe K⁺ concentration increased from 1.41% to 2.3%,K⁺ in ore bodies can be dissolved effectively.Changes in the Na+concentration is caused only by adding 3.5% of Na⁺ to halide formula reagent,and the Na⁺ in ore bodies did not participate in dissolving process,which ensures that the ore body skeleton is complete and do not appear to collapse.As a result,this dissolving-dirving technology is feasible.