To overcome the shortcomings of expansion and emersion of traditional simulation training system, use modular design methods to carry out an overall design on simulation training system. Based on analysis of detection theory and process of a certain type of artillery weather radar, based on object-oriented programming language VC++6.0 and ADO data sources and technology system, realize a simulation application program of simulation training system. Use Multigen Creator/Vega virtual simulation technology to construct three-dimensional simulation training scenarios. The result shows that it has achieved good training results and can satisfy the radar operator basic need of simulation training.