Abstract: At present, in the intelligent construction of coal preparation plant, there is little research and development on 3D visualization management centering on the whole life cycle from design, construction to production and operation and maintenance. There is also little research on the deep integration of 3D visualization and big data cloud platform. In view of the above problems, based on the building information model (BIM), this paper improves it and puts forward coal preparation information model (CPIM). The proposed model aims at the problem that BIM only considers the information model of coal preparation buildings and structures. BIM can not meet the needs of intelligent coal preparation plant construction. Combined with the big data cloud platform technology, a 3D visualization management platform for intelligent coal preparation plant based on CPIM (the platform consists of infrastructure layer, data sources layer, basic platform, application layer and business display layer) is designed. The data standard of coal washing engineering is constructed. The data access, management, storage, analysis and sharing of the whole life cycle of coal preparation design, construction, production and operation and maintenance are realized. The key technologies of the platform implementation of BIM lightweight engine, CPIM big data sub-platform construction, CPIM whole life cycle application, standard formulation of digital construction of coal washing project and software system independent research and development and domestic hardware adaptation are analyzed. Taking a coal preparation plant of China Coal Group as the research object, based on CPIM big data sub-platform and BIM 3D engine sub-platform, the CPIM whole life cycle 3D visualization application platform is constructed. And the localization adaptation of hardware is realized. The field application shows that the platform can carry out effective data acquisition, unified processing, storage, analysis and application for the design, construction and operation of coal preparation plant. The platform opens up the data channel of the coal washing industry. The platform realizes the 3D visualization management covering the whole life cycle of coal preparation plant design, construction, and production operation and maintenance.