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For the problems of the unfairness of the human-computer interface in the process of traditional aircraft virtual assembly, the simulation results are not intuitive and the operator cannot directly observe the changes and adjustment of the parameters during the operation of the control system and so on. According to the actual control requirements of the aircraft virtual assembly process system, taking the human-computer interaction of 3D mouse as an example, this paper proposed a three-dimensional mouse viewpoint control method based on Open Inventor technology. Based on the operation mode and working principle of 3D mouse, a new human-computer interaction model the human-computer interaction based on Virtools is realized, the simulation scheme of the simulation object is established, the simulation scene is rendered, and the simulation process is controlled flexibly.