To improve the design efficiency and construction quality of accelerator facility, and to solve the problems in the design and construction process of existing accelerator facilities, such as the multidisciplinary data island, the poor real-time interaction of data and the weak consistency of data in each system, and long design cycle and high cost, focusing on the construction requirements of accelerator devices, the collaborative design of α irradiation device for CS30 accelerator based on 3DE platform is proposed. On this basis a relatively complete set of accelerator facility collaborative design processes are sorted out, the multidimensional collaborative design of structure, piping, electrical and civil construction is realized, the whole design process is standardized, the design errors are reduced, the design efficiency and quality are improved, and the design cost is saved. Accordingly, the application of 3DE platform in accelerator facility design is promoted, and the construction time of the accelerator facility is effectively shortened.