Global warming and CO_2 emission reduction has become one of the most critical issues in recent years,due to further deterioration of natural environment,economic development and even survival of mankind. A promising approach for near-zero CO_2 emission power plants to be realized within the near future is the IGCC technology (integrated gasification combined cycle) with pre-combustion CO_2 capture. In order to provide a technical basis,this paper introduces the current situation of pre-combustion technology and makes a comparison of various CO_2 recovery methods, such as adsorption,membrane and absorption process. On the basis of IGCC characteristics,the paper pays special attention to the application range and prospect of existing solvent-absorption technologies,and makes an analysis to point out the possibility of cost reduction from three aspects: selecting a new efficient solvent,optimizing traditional regeneration process,and developing certain coupling technologies. Furthermore , the challenges and trend of decarbonization technology development are discussed.