Aiming at the problem that there will be misalignment errors among multiple sensors in the magnetic tensor measurement system in practical engineering

which will seriously affect the measurement accuracy

a calibration and correction method of misalignment error angle is proposed.By analyzing the generation mechanism of misalignment error

the misalignment error model of the measurement system is established

and the linear relationship between the orthogonal system output of the sensor and the reference sensor is constructed.Considering the problem that the least square estimation ignores the measurement noise error of each sensor

the overall minimum two multiplication is used to solve the misalignment error angle.Through simulation

the prediction accuracy of error is higher than 99.7 %.After the measurement and correction

the tensor component root mean square error（RMSE）is reduced to less than 65 nT/m

which is an order of magnitude lower than the least square method

which can effectively improve the measurement precision of the magnetic tensor measurement system.