Modern electro-optical theodolite with real-time measurement,high precision,automatic monitoring and tracking of the advantages of easy to reproduce images,etc.,widely used in aviation,aerospace,weapons testing and military field of scientific research.Theodolite tracking of the aircraft structure and a direct impact on the accuracy of the theodolite and stability.With the development of computer technology and finite element analysis to improve the theory,finite element analysis techniques will be integrated into the structural design has become a new trend.In this paper,for the altitude-azimuth theodolite tracking aircraft to carry out finite element analysis to calculate the static load frame deformation tracking and analysis of their implications theodolite measuring accuracy and actual results.