Abstract: Nano-SiO₂ microspheres were synthesized via sol-gel process,then SnO₂ particles was coated on.The prepared composite was characterized by X ray diffraction and transmission electron microscopy,results showed that SnO₂ was successfully coated on the surface of SiO₂,and the composite still preserved the original good dispersion of SiO₂ microsphere.The composite was then used as lithium ion battery anode material and its electrochemical property was tested,date showed that the composite had an excellent cycle performance.Compared with the pure SnO₂,although the composite has a little lower charge-discharge capacity at first cycle.However,after 20 cycles its charge-discharge capacity was 105.6% and 80.7% more than the former,respectively.So the composite prepared by this method has a good application foreground.