Present research status and development of clean coal technology

China is a country which has a big amount of coal production and consumption.It is a very important part to research and apply proper clean coal technology,it's also the main content of the national energy sources development strategy and has significant sense.The paper describes the background of research and the concept of clean coal technology,introduces and analyzes the status of research and development of clean coal technology with in China and abroad;in particular,describes the special features of Chinese clean coal technology,such as underground coal gasification,industrial moulded coal,coal water slurry,coal liquefaction,clean coal united cycling energy production techniques,in this paper,the features of the clean coal technology are shown,and the works which should be enhanced to develop the techniques in China are also pointed out.