Abstract: Aiming at the problem that the stabilization precision of the zoom optical system is difficult to control, the critical factors influencing the stabilization of optical axis were analyzed.A 3D entity model of the curve sleeve and guide rod of the TV optical zoom system was simulated in UG, after that the thermodynamic analysis was done with the finite element method. A method of adjustment measure and the control data which were different from the original one were proposed,the fixing method combining the glue with the follower ring was utilized to fix the front group of mirror.Results show that the research can improve the stabilization precision of the zoom optical system during the assembling, it increases the stabilization of optical axis from 12 to 5; Thereby the results establish the assembling foundation and theoretical basis for the development of following similar products. Additional,the validity of this method was verified by several experiments.