The invention discloses a method for measuring the phase sequence of a high-voltage overhead power transmission line by using a power frequency parameter tester, which solves a problem that line phase sequence manual one-by-one basic angle tower verification spends a long time and goes wrong easily. The method is characterized in that whether a circuit is smooth or not can be judged through measuring current and voltage of a single-phase circuit by using the power frequency line parameter tester. The method comprises the steps that measurement current is applied to the head end under the conditions that the head end of the circuit is open and that the tail end of the circuit is grounded, an output current value and an output voltage value, which are fed back after the circuit is boosted, are acquired by an observation instrument, and whether the head end and the tail end of the circuit are in the same circuit or not is judged; if the output current rises to a set rated current output value (3A or 5A), the head end and the tail end are judged to be in the same circuit, that is, a power transmitting side and a power receiving side of the phase are consistent in phase sequence; and if the output current is close to zero, the head end and the tail end are judged to be not in the same circuit, that is, the power transmitting side and the power receiving side of the phase are incorrect in phase sequence.