After decades of development, the philosophical thoughts of the original theory, epistemology and methodology of the landscape trialism have shown strong leadership and applicability in interdisciplinary theory intercourse, teaching experience and effect assessment. By combing the development background, practical application and innovative achievements of the landscape trialism, and evaluating and verifying the teaching effectiveness of the landscape trialism in the disciplines of landscape architecture, urban and rural planning and architecture through a questionnaire survey of 118 students in 2025. The results show that in terms of interdisciplinary theory intercourse, the philosophical origins of landscape architecture, urban and rural planning and architecture are unified, so there is a certain synergy between the theoretical methodology. In specific teaching, the landscape trialism can effectively improve the theory intercourse and practical ability of students from different disciplinary backgrounds and at all stages of undergraduate and graduate students; in terms of interdisciplinary teaching experience, based on the landscape professional education trialism, teaching experience is carried out from three aspects: "basic level, middle level, and cross-level", focusing on students" professional knowledge understanding, practical ability transformation, and interdisciplinary holistic thinking cultivation; in terms of interdisciplinary effect assessment, the landscape trialism has a positive impact on each subject in professional theoretical cognition, professional skills improvement, and professional emotional identification.