Abstract: This is an article in the field of earth sciences and mining processing engineering. Potash ore occurs in the salt layer of Cambrian Hormuz Formation, The ore body is in dancing band with great thickness variation. The ore type is chloride-type sylvite ore, the main ore mineral is sylvite, with KCl content of 2.5%～35.20%. The Cambrian is a lagoon facies deposit. The continuous evaporation of potassium-bearing brine in the Persian Gulf formed a series of marine evaporite sequence containing potassium salt.Affected by the early Alpine structureactivity, the salt layer was compressed to form a salt diapir structure.Using the test flow of one roughing, one scavenger, two concentrating and Coarse ore washing, good test indexes have been achieved, and potassium chloride products containing 87.44% KCl (wet basis) (91.14% dry basis) or 88.97% KCl (wet basis) (93.69% dry basis) can be obtained, with KCl recovery rates of 85.93% and 81.70% , respectively.