A certain regional tectonic evolution history can be rebuilt by paleostress fields analyzing; faults usually occur in uppermost crust, and extremely useful structures to determine paleostress field in a certain region. In this paper, we give an overview of new advances of the paleostress field theory, methods and application in a complex structural belt, as testified by a case study. A modified Anderson model, which was originated from a traditional Coulomb—Mohr shear failure theory, proposes how a fault do form and develop along a pre existing weakness zone (or pre existing faults), providing the base to analyze fault structures. Additionally some progress was made in reconstructing the paleostress field in a certain orogenic belt, which can be rebuilt by synfolding striae measurement and analysis. Then we give a case study on the paleostress in the Dabashan orogen by this way, showing this method is effective to analyze the paleostress field.