The invention provides a rotary calibration method for rocket engine thrust vector calibration and belongs to the technical field of piezoelectric sensor measuring. According to the rotary calibrationmethod, on the basis of the structural principle of a measuring cell, a vector force testing system is set up firstly and subjected to error source analysis, a calibration matrix needing to be calculated is obtained through a linear calibration method, a sensitivity analysis model of the calibration accuracy to the coupling coefficient is set up, and it is concluded that the interference coefficient of the main direction to the side direction is the most important factor affecting the testing accuracy; then through a force vector offset calibration system, error analysis is conducted to search and obtain the mechanism of interference of the main direction on lateral force; a mathematical model of contact force of a calibration rod and a spherical gasket as well as the calibration rod anda tapered-face gasket is set up, and the oval geometric distribution of the lateral force in main direction calibration is obtained; and finally, aiming at the periodic characteristics of oval distribution, on the basis of the thought of error homogenization, according to the put-forward rotary calibration method, the rocket engine thrust vector is calibrated.