The Xiaoqinling metamorphic core complex experienced two stages of extension with different mechanism. The first stage took place along the detachment fault developing along the margin of the complex. This stage of extension occurred simultaneously with the orogeny and its direction was parallel with the orogenic belt, i.e., the upper plate moved toward WNW. Ages for this stage were 135 ～ 123 Ma ago, which was resulted from the crustal thickening and magmatism caused by the Yanshanian intraplate orogenic movement. The second stage extension formed retrograded mylonitic zones and normal faults within the complex, which represented the collapse of the complex caused by the further uplift in an age ranging from 120 to 106 Ma ago. The contractional thrusting occurred in Xiaoqinling at the same time as the collapse extension within the complex. It was caused by the residual orogenic compression and the reduction in extensional driving force due to tectonic denudation. In Xiaoqinling, the altered phyllonitic gold deposits were controlled by the retrograded mylonitic zones and their mineralization was dominated by the extensional tectonics. The quartz-vein gold deposits were formed in the thrusts within the Xiaoqinling metamorphic core complex. Their formation might have a direct relation to the tectonic inversion during the collapse of the Xiaoqinling metamorphic core complex.