SnO, is considered to be one of the most promising SIBs anode materials due to high theoreticalcapacity ,lower potential, environmental-friendly and non-toxic. But its conductivity is not good, and in theprocess of sodiation/desodiation, volume expansion will occur, resulting in the battery capacity and cyclestability and other electrochemical performance degradation. Because of carbon has good conductivity,and caninhibit the volume expansion of material in the process of sodiation/desodiation.Therefore , we prepared Sn0,/Cnanocomposites by one-step synthesis.When as the anodes of sodium-ion batteries( SIBs) , the carbon-coatedSnO, had better electrochemical properties than pure SnO,.