In order to eliminate the rock,electromagnetism field and metal field interference on the spinning missile. This paper design a set/reset cuicurt to protect the MR sensor from the jam of strong magnetic field and design a flitter circuit,rational layout to protect real signal from the jam of high frequency signal and promoted a error com-pensation and watchdog algorithm to compensate the soft/hard material error, zero error and orthogonal error. The result of rotating platform test and data analysis show that the method of antijam design combination reduce the jam error and the precision of rotation angle measure system can be improved to 1 ° . It has a certain project value for the roll angle measurement of the spinning projectile.%为了消除弹载地磁测量系统所受的矿山、电磁、金属等干扰，本文设计了充磁电路，消除强磁场对磁阻传感器的干扰；设计了滤波电路及合理的布线，消除高频干扰信号；再提出了误差识别补偿及看门狗设置算法，补偿了软硬磁干扰、零位误差、正交误差。转台试验与数据分析表明：各组合方法的采用，减少了干扰误差使姿态角测量精度达到1°以内，具有一定的工程价值。
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