Abstract: Aiming at the increasing demands for the search scope and oprerating distance of current military photoelectric searching and tracking sighting device TV camera system, through analysis and comparison of the mature TV camera system, a research direction using the structure with miniaturized fixed focal length, multifield of view (FOV) was clearly determined. Based on the research direction, a design idea using embedded modular front lens group optomechanical srtucture was proposed, which can realize the fixedfocal length, multiFOV TV camera system miniaturization design plan. After optical design and optomechanical integration design, a 4FOV TV camera with large optical zoom range(20), stable optical axis and 4 FOVs sharing 2 common imaging devices was finally completed, it can meet the needs of existing military searching and tracking photoelectric sighting device TV camera system.