As the main supporting structure for a space visible camera, the truss is critical for ensuring the mechanical performance of the camera body. To improve the stiffness and stability of the space camera body, the design of a truss structure is studied. The basic structure of a truss, the influence factors of mechanical property of poles and the influence of pole length and angle on the camera body are presented. The features of both Δ shape and X shape truss structures are analyzed. By selecting reasonable quantity and distribution form for poles, the mechanical properties of the camera truss are ensured. Then, the mechanical properties of the camera body are verified. The result shows that this design can ensure the truss structure to obtain good mechanical properties. So, it meets the design requirements of the camera body.