本文从相控阵雷达测量误差引入的导弹－目标视线角误差的角度分析了雷达导引精度与雷达测量精度的关系，并在此基础上提出了一种提高雷达导引精度的方法——信标法。仿真结果表明，此方法可以明显减小由雷达测量引入的视线角系统误差，提高雷达导引精度。 This paper analyzes the relationship between radar guidance accuracy and radar measurement accuracy from the perspective of missile-target line-of-sight error introduced by the measurement error of phased array radar and proposes a method to improve the accuracy of radar guidance based on this Standard method. The simulation results show that this method can significantly reduce the systematic error of the line of sight angle introduced by radar measurement and improve the radar guidance accuracy.