针对扭转光纤电流传感器由于环境因素（如温度、压力、振动）变化使光纤中传输光偏振态改变，从而导致传感器输出信号漂移问题，提出了一种新的信号处理方法进行克服。这一方法适用于交变电流的检测。实验中通过旋转输入线偏振光偏振方向的方法检验了所提方法的有效性，证明这种补偿方法对传感器偏置相位的任意偏移均适用。 Aiming at the change of polarization state of transmitted light in optical fiber due to the change of environmental factors (such as temperature, pressure and vibration), the twisted optical fiber current sensor has caused the signal output drift of the sensor. A new signal processing method is proposed to overcome this problem. This method is suitable for the detection of alternating current. The validity of the proposed method is verified by rotating the polarization direction of the polarized light in the input line. It is proved that this method is suitable for any offset of the bias phase of the sensor.