The invention discloses a single-loop power transmission line zero sequence parameter identification method capable of eliminating measurement error influences. A zero sequence equivalent susceptance calculation value B0, a zero sequence equivalent reactance calculation value X0 and a zero sequence equivalent resistance calculation value R0, which are all calculated through the first step, the second step, the third step and the fourth step, of a single-loop power transmission line, and the sensitivity, (please see the formula in the specification) calculated through the fifth step, of zero sequence resistance relative to a zero sequence voltage amplitude value and the sensitivity, (please see the formula in the specification) calculated through the fifth step, of zero sequence reactance relative to a zero sequence voltage phase angle are used for quantifying influences of measurement errors on a zero sequence parameter identification result, and the zero sequence equivalent susceptance calculation value B0, the zero sequence equivalent reactance calculation value X0 and the zero sequence equivalent resistance calculation value R0, which are all calculated through the first step, the second step, the third step and the fourth step, of the single-loop power transmission line are corrected through the sixth step. The method eliminates main influences of the measurement errors on the zero sequence parameter identification result and improves the zero sequence parameter identification precision of the single-loop power transmission line.