大型装备光电定向系统是一个光机电一体化的复杂系统，为达到良好的模拟效果，采用半实物仿真。本文主要介绍系统实现的方案、步进电机高精度细分控制系统的研制、仿真系统性能自动检测的实现以及多媒体技术在训练教学中的应用。 Large-scale equipment Photoelectric directional system is a complex optical-mechanical system, in order to achieve good simulation results, the use of semi-physical simulation. This article mainly introduces the scheme of system realization, the development of high precision subdivision control system of stepper motor, the realization of simulation system performance automatic detection and the application of multimedia technology in training teaching.