Abstract: The application of the virtual desktop in the production system is characterized in saving costs, reducing operation maintenance workload and reducing management difficulty. However, because the overall architecture of the virtual desktop is different from the traditional terminal mode, the availability of the traditional information confidentiality mechanism is not high enough in the virtual desktop environment. So in this study an access control model, Virtual Desktop Information Flow Model (VDIFM) based on the information flow, is proposed, through which the single-direct information flow can be effectively ensured. At the same time, in this study, the prototype system is also designed for verification and tested and the test results show that the model has a certain practicality.