The paper analyzes the trade structures and features between China and Russia，Kazakhstan，Kyrgyzstan，Tajikistan，Uzbekistan. By constructing general equilibrium models，a SCO FTA’s comprehensive impacts on its members’ macro-economic effects have been deliberately simulated. Our research results predict，during the process of economic integration within SCO，a SCO FTA with no bilateral tariffs would increase the SCO members’ welfares，real GDP and their foreign exports and imports.