Abstract: A shifting transformer (called a "phase-shifting transformer") changes the voltage and current phases at both ends of the connected line through gear adjustment to achieve power flow regulation. However, after the phase-shifting transformer is connected to the line, the changes in its equivalent impedance and phase-shifting angle will significantly impact the performance of conventional distance protection, and there is a risk of refusal or misoperation of distance protection. To address the issues above, this article first analyzes the impact of phase-shifting access on conventional distance protection and the limitations of existing solutions. Based on the wiring form and topology structure of phase-shifting transformers, a fault crossing control scheme for phase-shifting transformers with damping/bypass composite modules is designed and proposed. This scheme monitors the input current of the phase-shifting transformer in real-time. When the detected current exceeds the starting value, a bypass module is put into operation to achieve rapid isolation and protection of the phase-shifting transformer. At the same time, a damping module was further designed and configured to limit the short-circuit current of the bypass circuit. Control the on/off of thyristors in damping/bypass composite modules to achieve fault crossing of phase shifting. This fault traversal scheme is not affected by the fault location and the gear of the phase-shifting transformer and can improve the reliability of line distance protection after the phase-shifting The transformer is connected. Finally, a phase-shifting model was constructed based on PSCAD/EMTDC, and the proposed scheme's effectiveness and feasibility were verified through many simulation experiments.