Testing and appraisal are important links in evaluating the full lifecycle operation of unmanned systems, and are the last hurdle before entering the consumer market and military battlefield. They play a crucial role in improving the quality of unmanned systems. The performance assessment of traditional single system, single platform, and single equipment under standard conditions is no longer sufficient to meet the requirements of equipment development. Virtual experiments can make up for the shortcomings of physical experiments, improve the safety, efficiency, and effectiveness of testing and verification work, and have become a new form of experimentation that combines physical experiments. Firstly, an introduction is given to the real, virtual, and constructed LVC integrated simulation technology. Based on the requirement analysis of the LVC based weapon equipment joint simulation test platform, the basic composition and architecture of the platform are designed. Finally, the platform is implemented. The joint simulation test platform designed in this article can be used to combine resources of different scales according to the test purpose, thus achieving joint simulation tests at the unit level and system level of weapons and equipment.