Abstract: According to connotation of intelligent coal preparation plant, framework of intelligent coal preparation plant was introduced from aspects of Internet of things layer, control layer, management layer and decision-making layer. Key technologies adopted in construction of intelligent coal preparation plant were expounded emphatically, including intellectualization of dense medium separation process, flotation process, slime water health guarantee system and coal preparation manufacturing execution system, which laid technical foundation for development of coal preparation plant from automation and informatization to intelligence.