The invention discloses a low-voltage balancing outlet method for a triangular transformer. The low-voltage head leads of an A phase and a C phase are directly connected to the head outlet end of a B phase low-voltage coil, and a zero line lead is directly led out from the head of the B phase low-voltage coil; because of the symmetry of a triangle transformer, the head leads of the A phase and the C phase have the same length and resistance, the head of a B phase has no lead, and the resistance of the head of the B phase is zero; and the terminals of the A phase and the C phase are directly led out, the resistances of the terminals of the A phase and the C phase are zero, the terminal lead length of the B phase coil is regulated to be as same as that of the head lead length of the A phase or the C phase, and the terminal lead resistance of the B phase is as same as the head lead resistances of the A phase and the C phase. Therefore, the loop of each phase is only provided with a lead bus resistor, so the problem of low-voltage lead resistance unbalance of the triangular transformer is radically solved.