Abstract: The Qingyuan area in northern Liaoning Province is located in the eastern segment of the northern margin of the North China Craton, with large−scale strongly deformed granitic rocks. It is an important window to further study the Mesozoic Yanshanian movement and the superposition and transformation of multiple tectonic regimes of NE China. In this paper, the deformation characteristics, age and dynamical background of the regional Dagujia ductile shear zone are determined by detailed macro− and micro−structure analysis, finite strain measurements, quartz EBSD fabric and zircon U−Pb dating. The results show that the Dagujia ductile shear zone develops NW−SE−trending foliations and SE−plunging mineral stretching lineations, with a NW−trending sinistral strike−slip shear characteristics. The deformation temperatures of the rocks are relatively high, ranging between 550°C and 650°C. The granitic rocks in the shear zone primarily formed in Mesozoic multi−stage magmatism. Combined with the regional tectonic chronology data, the deformation age of the shear zone is the latest Late Jurassic to earliest Early Cretaceous, reflecting the local response of the Yanshanian Movement B−episode in the northern Liaoning Province. The Reactivation of regional fault zones caused by the subduction of the Paleo−Pacific Plate is the main reason for the formation of the Dagujia ductile shear zone.