Aiming at high real-time requirement, large field of view, large scene coverage and realistic imaging effect of flight simulator visual system. Based on requirement of specific requirements of certain type helicopter flight simulator research, designed its simulator visual system. The display system, multi-channel network structure, visual simulation software and scene database are designed and realized, and some key technologies such as dome processing technology, multi-channel communication synchronization and blending were deeply researched. Results indicate that system meets research requirement, achieves high-quality of visual effect and receive high praise from the pilots.