In order to solve the problems of applying BIM in landscape engineering, such as hard to integrate multi-disciplinary models, poor visualization of 3D models, low efficiency of landscape greening design, and poor sense of scene interaction experience, this paper uses BIM and Unreal Engine technology to conduct research on visual interactive design, taking Antuo Mountain Nature Art Park in Shenzhen as an example. The volume and surface area algorithms are imported to Unreal Engine to calculate 3D earthwork through operating on visual interactive interface. Moreover, Dynamo+ArcGIS technology is applied to obtain basic information such as nursery stock names and locations, and landscape information models are created in batches through the script editor in Unreal Engine. With the integration of various multi-disciplinary models and data, this paper explores the collision detection among landscape model and other models and further determines the locations of landscape sensitive points by adding interactive blueprint modules such as viewshed analysis and collision detection modules. The results shows that the interactive experience of scene visualization is improved through the combination of BIM and Unreal Engine technology, and the design efficiency and quality of landscape models are greatly enhanced.