The Simao basin is an important potassium salt basin in our country and the Mengyejing potash deposit is the only halide solid potash deposit in China. In this article, we comprehensive analysis of the geological background, the ancient environment, tectonic evolution, the characteristics of sedimentary and potassium salt layers. Using two geophysics methods to explore in studying area, for example: gravity and AMT. By studying the gravity profile map and the resistivity crosssection, and then compared with two drillings, which named MK-1 and MK-2, and their depths are up to 2500m and 3000m. We can infer the fracture structure, diapirs, and then speculated that Mengyejing potash ore body was knead twist flows to shallow along the fracture from deep in extrusion structure. Analyzing two geological exploration profiles from the Mengyejing mineral deposit, researching the distribution characteristics of salt rock and the formation process under the background of tectonic movement, applied 3D model and visualization technology, to recover the 3D the salt body. By using the principle of "balanced section technique" to simulate the process of salt extruding along the fault under Spin and extrusion force. Through these research, expand the through of finding potassium salt in Simao basin, and provide better foundation for the next phase work.