The increase of China' s per capita GHG emission is reasonab le provided the emission is less than the world average.However,the emissio n reduction is possible through CDM i mplementation during China' s rapid economic growth.It is not only beneficial to Annex I country' s cost -effective emission reductio n but also beneficial for China' s sustainable development.In this p aper,economic structure,technolo gical innovation,energy efficiency,and environ-mental -protection regulation are r egarded as four major driving factors.Based on them individually or synt hetically,different Scenarios are made up.A CG E model is employed to calculate emis sion reduction of scenarios with above -mentioned factors improving.The paper also makes a comparison of effectiveness of emission reduction betwe en dif-ferent scenarios,and an analysis of characteristics of the impact of parameter change on emission reduction.