According to the characteristics of data fusion integrated treatment information and cloud model combining qualitative and quantitative information processing method，coal preparation plant Computer Integrated Manufacturing Systems(CIMS) environment is analyzed，and data fusion architecture of coal preparation plant CIMS environment is proposed. Data fusion process of three subsystems based on cloud model are analyzed and their model diagrams are established. Data fusion approach and cloud model algorithm of each subsystem are proposed. Simulation results indicate that the cloud model can improve the control on the production process by data fusion method.