In recent years, the social and economic development is getting faster and faster, which also promotes the further improvement of modern information technology. Various economic fields have begun to use modern information technology to improve their work quality and work efficiency. In landscape planning, computer is an important auxiliary means. In traditional landscape planning, designers often carry out various design work on drawings, but in actual construction, there will be deviations from design drawings, resulting in rework. If modern information technology is used, a virtual and three-dimensional landscape engineering structure can be constructed by using three-dimensional technology to test the scientificity of design drawings, which can greatly reduce accidents during construction, grasp construction details, improve construction quality and efficiency, and reduce cost investment.