Abstract: The BDS-3 GEO satellites provide a number of unique services, but the accuracy of its precise orbit determination is poor. In addition to high altitude and constant position, the monitoring stations configuration is also an important factor of GEO satellites orbit determination. Firstly, the basic principle of orbit determination is introduced and the observation equation is linearized in this paper. Secondly, The GDOP value is parameterized by using orthogonal trigonometric functions and expressed in the configuration of the monitoring stations. Thirdly, the relationship between stations configuration and the accuracy of precise orbit determination is analyzed according to nested cones. Finally, the simulation experiments are carried out, and a kind of optimal solution is concluded.