In the past half a century, no major technology breakthrough has been made in potash prospecting in the ancient potash deposits of the Tarim basin. Multiple marine transgression- regression cycles have been identified within the Yarkand basin dating to the Late Cretaceous- Early Paleocene, that resulted in the deposition of very thick evaporites, such as those found in the Yarkandbasin located in southwest, and the Kuqa Basin in the north Tarim basin. The thickness of evaporites ranges from dozens to thousands of meters. From the seventies to the 20th century, the Tarim basin has long been considered as an important area for potash prospecting. Initial results of this study indicate higher values of potassium in selected targets. These include higher values of potassium chloride from 0. 210% to 0. 458% and 0. 288% average in samples on the petrogeochemical survey, 0. 54 value on coefficient of bromine chloride, the value 0. 11 g/L of potassium in spring brine, and the discovery of carnallite in salt blossom in Wupa area, located in the northwest of the Yarkand basin, which is predicted to be a favorable area for potassium exploration.