Global warming has recently caused a series of problems, which makes people paying more attention to the issue of greenhouse gas emissions. As the most promising and economical technology to capture CO_2, chemical looping combustion (CLC)has attracted the attention from researchers all over the world. In this paper, a moving bed apparatus was set up for a syngas chemical-looping reaction process using sinter ore as oxygen carrier. The trend of gas concentration variation along the height of the moving bed under steady state condition was obtained and the influence of reaction temperature, particle size of sinter ore and the flux ratio between gas and solid on the reaction was analyzed. The experimental results showed that reducing gas concentration decreased from bottom to top of the moving bed. The conversion rate of syngas increased significantly with increasing temperature. The particle size decrease facilitated the reduction reaction in the moving bed. As a result, the conversion rate of syngas was improved with the decrease of the flux ratio between gas and solid.