Under the mobile platform, the purpose is to achieve high-precision direction pointing compensation. By introducing the mobile platform′s habitual parameters, calculating the posture of the platform, establishing a direction pointing mapping model, relying on calculation rate of the algorithm in real time, the direction pointing is compensated in real time. Through data simulation verification, the algorithm can stably and quickly calculate the direction, and make up for the direction error caused by posture changes, which is of great significance for the high-precision control of the mobile platform.