Abstract: The main activity stages and formation mechanism of the Shunbei No.8 strike-slip fault in the Shunbei region of Tarim Basin were studied based on new 3D seismic data and regional stress field background. According to the zoned deformation in the Middle and Lower Ordovician, the fault was divided into three segments:upright-linear, positive flower-pinnate, and negative flower-pull apart. The reservoir properties of drilling wells and the tectonic styles of the fault showed that the negative flower-pull apart zone is most favorable for reservoir development, the positive flower-pinnate zone the second, and the upright-linear zone the worst.