The invention discloses a measuring method for calibration of north direction of a phased array antenna based on gyro orientation. The measuring method comprises the following steps of 1, selecting a ground point A around the phased array antenna, arranging a gyro total station at the point A, and measuring the azimuth alphaAO of a measuring line AO; 2, calculating to obtain the azimuth of a measuring line OA; 3, arranging a total station at a point O, enabling a front mirror of the total station to sight the ground point A; configuring a horizontal dial of the total station, and setting the reading of the horizontal dial of the total station as alphaAO; 4, rotating a sighting part of the total station, setting the reading of the horizontal dial along the sighting direction of the total station as 0 (degree)-00 (minute)-00 (second), and selecting any point N on a true north direction line as a calibration reference point; 5, arranging the total station at the point N, enabling the total station to sight a point O, horizontally rotating the phased array antenna by using the point O as the center of a circle, and positioning the main axis of the phased array antenna on a sight line direction, so as to complete the measuring on the calibration of the true north direction of the phased control antenna. The measuring method can effectively solve the problems of waste of time and labor and low calibration accuracy of the existing conventional calibration method.