In this manuscript, we present a facile and friendly wet chemical method to prepare monodisperse SnO2 nanocrystals assembled on reduced graphene oxide (RGO). Aided with sodium dodecyl sulfonate, small SnO2 nanoparticles (∼5 nm) are deposited onto the flexible support evenly and tightly. A cheap compound, urea, is used for the controlled precipitation of SnO2 and the reduction of graphene oxide. When tested as the anode material, the hybrid composite electrode delivers excellent cyclability at high current density, such as high reversible capacity over 1000mAhg−1 after 400 cycles at 0.5Ag−1 and ∼560mAhg−1 after 400 cycles at 1Ag−1. The composites also exhibit superior rate capability varying from 0.1 to 4Ag−1, and possess capacity of 423mAhg−1 at 4Ag−1. This synthesis strategy seems to be suitable for industrial production and can also be extended to produce a variety of metal oxide/RGO composites.