Abstract: Accurate topology data is an important foundation for the optimization of distribution network operation mode, fault handling, line loss calculation and other applications. In order to improve the reliability and automation level of distribution network topology recognition, we proposed a medium-voltage distribution network topology identification method for joint low-frequency short-term current pulse signal transmission path tracing and high-frequency power line carrier based distance measurement; meanwhile, we proposed a low-frequency short-term current pulse signal detection algorithm based on even harmonic sine wave template matching. The signal detection algorithm has advantages of greater signal-to-noise ratio and thus can improve the reliability of signal detection effectively. Finally, a pilot application was carried out. The results show that the short-time pulse current receiving reliability is more than 95%, and the high-frequency carrier ranging error is less than 5%, which verifies the feasibility and promotion value of automatic topology identification of distribution network.