The reconnaissance, preliminary exploration and additional exploration for the Mengyejing rock salt (potash salt) deposit has lasted for 13 years. Field work was conducted twice in the ore district and its outskirts, and the result was repeatedly interpreted; following the additional exploration, researches were made again. This paper makes an account of the geological outcomes gained in geophysical prospecting work at various stages.Geophysical and geochemical prospecting techniques were tried out at the early stage of geological reconnaissance, and it was demonstrated that gravity survey in coordination with electrical sounding was an effective method for direct search of salt. The depth, thickness, spatial form and estimated prospe ctive reserves inferred from geophysical prospecting results were mostly con firmed by preliminary exploration.Geophysical prospecting work was once more performed before the addi tional exploration; anomalies were reexamined; data of the ore district was collected; geophysical results were reinterpreted; and the boundary of the orebody was delimited. The argument was put forward that the drill hole hadalready passed through the rock salt bed and no salt could be found at the depth of northern flank. This provided data for "exploring the depth and the margin" in the geological work. The gamma-ray energy spectral logging divided the potash salt bed with effectiveness. It has been proved that the integrated study by combining geophysical prospecting with geological data and data of saline spring chemistry can classify the salt (potash salt) ore prospective areas.Through geophysical prospecting work for rock salt (potash salt) depo sits, we have summarized a suite of reasonable geological and geophysical pros pecting procedures, which play the function of reducing target areas, accelera ting the course of the work and cutting down the investment, thus yielding good economic benefits.