Abstract: To address the challenges of teaching highly theoretical concepts like “dielectric constant” in electromagnetics courses and the lack of intuitiveness in traditional experiments, while also responding to the emerging engineering education reform that emphasizes the integration of cutting-edge technologies and practical skills, this paper designs a comprehensive teaching experiment based on terahertz time-domain spectroscopy (THz-TDS). The experiment focuses on the electrically tunable dielectric properties of liquid crystal materials and establishes a tripartite teaching framework integrating ‘virtual simulation-theoretical calculation-experimental measurement’. Within this framework, students can visually validate transfer matrix theory and accurately extract the dielectric constant and loss tangent of liquid crystals in the terahertz frequency band. This comprehensive experiment not only deepens students' understanding of abstract electromagnetic theories but also enhances their interdisciplinary innovation and practical abilities by combining simulation modeling, programming, and the operation of advanced instruments, thereby laying a solid foundation for cultivating students’ innovative thinking and comprehensive problem-solving skills in complex engineering contexts.