"Landscape Architecture Design" is an important basic design course for undergraduates majoring in landscape architecture in China. The teaching focus is to cultivate students' cognition and design of three-dimensional garden space. At present, the classroom teaching of "Landscape Architecture Design" has a limited space dimension of course teaching. Virtual reality (VR) technology has immersive, the three characteristics of interactivity and conception can help teachers to enrich the form of classroom teaching, cultivate students' spatial thinking, and enhance students' spatial simulation experience. Focusing on the key points of virtual reality (VR) technology, this paper discusses the application of virtual reality (VR) technology in The specific implementation method in the course of "Landscape Architecture Design": in the teaching preparation process, teachers can use virtual reality technology to build a three-dimensional panoramic courseware library of landscape architecture cases, and students can break the geographical restrictions and enter the virtual scene to experience all parts of the world. Excellent garden landscape, at the same time, teachers can select excellent garden space cases according to the teaching theme, and collect VR information; secondly, in the classroom teaching, teachers can use projection equipment or students to use simple VR glasses to watch the panoramic cases that have been made.