Virtual experiment teaching system based on LabVIEW software platform was developed for teaching of signal analysis and process in packaging test technology. The system can make some theories, such as abstract concepts, theorems, mathematics transform, signal analysis of time domain and filtering denoising theory, more directly to perform and proving. By this way, funds were saved and teaching effect improved. The open and modular design characteristics of the system provide a platform for students' independent learning and innovation experimental design.