Based on the positioning information and attitude information provided by the high-precision receiver with the inertial navigation module, through the space rotation coordination system method, the satellite angle in the geographic coordinate system is deduced, and the existing antenna-satellite mathematical model is improved. The radius of curvature of the earth's ring and the height of the antenna are introduced, which improves the accuracy of the antenna pointing angle in the geographic coordinate system. In addition, the attitude information is introduced, and the antenna-satellite angle model in the carrier coordinate system is established to reduce the influence of the carrier attitude. Finally, the simulation results show that the improved algorithm model can improve the accuracy of the antenna pointing angle to some extent.