Abstract: In view of the problem that overhead line reclosing principle is lacking in selectivity and easy to recolse on permanent faults in multi-terminal flexible DC (MTDC), many experts have proposed a series of single-terminal reclosing principles. However, the resistive coverage for each side of a protection element is not always identical, even there are dead zones at both ends of the zone. Besides, some reclosing schemes need additional devices or auxiliary control methods when injecting discriminant signals. Therefore, this paper tries to solve the above problems by means communication. Firstly, the fault characteristics of temporary fault and permanent fault are analyzed. And the waveform similarity difference between the deduced value and the measured value of linear mode current is obtained by comparing and analyzing the characteristics of different fault properties. Then, the waveform similarity characteristics are analyzed by the Hausdorff distance algorithm and a signal injection time sequence of DC circuit breakers(DCCB) without additional devices or auxiliary controls are proposed.Finally, an adaptive reclosing scheme based on the transient current waveform similarity matching is proposed. A large number of simulation results show that the protective reach of reclosing criterion proposed in this paper can cover the entire transmission line, with high sensitivity and well applicability.