Abstract: This paper analyzes and summarizes the main problems of 3D coal preparation plant design, collaborative design and achievements protection. It describes the construction and application of virtual desktop cloud platform based on Coal Preparation Plant Design Virtual Desktop Cloud Platform, which is deployed in the Department of Mineral Processing Engineering (China University of Mining and Technology (Beijing)). The platform isn’t limited by time and space, and it not only can solve the problem of cooperative work and mobile office among the branches and the professionals, but shortens the coal preparation plant design cycle and improves the design quality. By using the multiple security policy, the design data is stored in the cloud platform securely, which can prevent the leakage of design result and protect the intellectual property right of the enterprises.