On the basis of the traditional fourposition north seeker scheme,a new transposition scheme for the optical fiber gyroscope north seeker is proposed in this paper.The ψtype transposition scheme is used instead of the conventional perpendicular transposition scheme in horizontal plane.Compared with the traditional scheme, it not only maintains the original advantage,but also can reduce the transfer time by 25%.Under different circumstances,the error caused by the dead zone of FOG can be avoided effectively by using the formula constructed skillfully and selecting the corresponding position of the gyroscope output.And it can improve the accuracy of the north seeker in certain angle range.