Abstract: To solve the shortcomings of the existing active traveling wave location methods, such as the difficulty in locating the fault at the distribution network's terminal and the existence of security risks, a method of fault location by injecting pulse from the low voltage side of the distribution transformer was proposed. Firstly, based on the measured parameters of two distribution transformers, a pulse injection strategy was proposed. The effects of different pulse shapes and widths, injection methods and transformer types on the signals obtained from the high-voltage side were compared and tested, and single-phase injection of triangular pulses through dry-type transformers was selected for fault distance measurement. Then the response signals of pulse signals at injection points under different conditions were compared, and the VMD-TEO method was used to extract the mutation points, so the fault distance could be calculated. The low-voltage side pulse injection fault location model based on PSCAD and the pulse injection location platform with a line length of 935m were established, and the errors of fault distance of two experiments were less than 50m, which indicates that the proposed method can find the fault location of distribution network under a certain ground resistance fault, and is helpful to improve the applicability of the active traveling wave location methods.