With the improving requirements of satellite′s imaging quality, it often requires plenty of thermal control resources to meet the requirements of the space camera′s temperature. Because the resources of small satellite are rare, it is important to study the thermal sensitivity of the camera component, rational distribution of thermal control resource and how to improve the image quality. First, researching status and methods of thermal-structural-optical integrated analysis are introduced. Then, the finite element model of space video camera is established to analyze the influence of thermal deformation of the components under the temperature load on the optical system′s imaging quality. Last, contrast analysis of the results under different operating conditions are finished and the influence of the components under the temperature load on the optical system′s imaging quality is achieved. The results show that reducing temperature load of every operating condition whose influence to the modulation transfer function is on the top six can make the image quality meet the requirement. It provides a reference to the thermal control design of the video camera.