In order to promote the digitization level of landscape design, the application of computer virtual reality technology in landscape teaching is discussed in this paper. Firstly, the probability of related core technology is explained. Secondly, the various stages of virtual reality technology aided landscape design are analyzed, and the SketchUp virtual modelling software is used to explain and demonstrate the specific cases. Finally, the application characteristics and advantages of virtual reality technology are summarized, and the application status of the technology in university landscape architecture education is discussed. The application results show that the introduction of computer virtual technology into the landscape design teaching in universities can effectively improve teaching efficiency, and SketchUp modelling can also complete the virtual modelling of buildings, vegetation and so on to assist landscape design. The research in this paper is of great significance in guiding the application of virtual reality technology in landscape design teaching.