The invention discloses a preparation method of a ZnSb<2>O<6> anode material for a lithium-ion battery. The material is ZnSb<2>O<6> micro-nano particles in a tetragonal crystal structure; and the preparation method comprises the following steps: mixing a zinc salt solution and an antimonic salt solution through low-temperature stirring, and then adding a reducing agent for stirring; and filtering and drying mixed solution, and carrying out thermal treatment to obtain the ZnSb<2>O<6> in the micro-nano structure. The material disclosed by the invention has good processability and shows excellent lithium storage performance when applied to the lithium-ion battery; meanwhile, the preparation method has the characteristics of being simple to operate, friendly to environment, low in energy consumption and low in cost; and large-scale industrial production is easy to achieve.