Abstract: In multi-terminal VSC-HVDC, the fast protection scheme is generally with the dead zone problem under high-resistance fault, while the backup protection is insufficient in the operation speed, making the high-resistance fault hard to be detected in time accurately. In this paper, a fast fault-resistance immune fast protection scheme was developed. The similarities of the internal and external fault were analyzed, and the cause of the dead zone was revealed. Further, the differences in the impedance angle under internal highresistance fault and external fault were investigated. According to the differences in the impedance angle, cross wavelet transform（CWT） was employed to design the criterion of the internal high-resistance fault, and fast protection scheme was proposed. Finally, the proposed protection scheme was validated in a four-terminal VSC-HVDC model.