In the light of zoom lenses of optical-electronic counteraction platform, an opto-mechanical structure is designed and thermal optical property is analyzed. Based on 30～120 mm zooming design requirement, the cam mechanism is adopted to design. In order to ensure that the optical system can obtain high resolution images under high-low temperature, thermal deformation of the whole machine under highlow temperature and rigid body displacement under axial temperature field are analyzed by means of finite element method. Subsequently, mirror surface after thermal deformation is fitted by Zernike annular polynomials and introduces into Zemax to obtain variation curve of modulation transfer funciton (MTF), peakto-valley (PV), root mean square (RMS) evaluation function with temperature change to proof of optomechanical design rationality. Finally, the analysis results and temperature adaptability of zoom lenses are verified through high-low temperature reliability experiments.