The formation characteristics of the iron-manganese oxides were studied by leaching the quartz sand columns periodically with different concentrations of mixed iron and manganese ions for forty times. The results were as follows: ① With the increasing leaching times, the concentrations of iron and manganese ions and pH value of leaching liquids generally exhibited decreasing first and increasing afterwards. ② Iron and manganese oxides produced under different treatment conditions showed extremely significant difference in content. The higher the concentrations of iron and manganese ions in the treatments were, the higher the content of iron and manganese oxides coated on the sands was. The condition that the molar concentration ratio of iron and manganese ions of leaching liquid was 2∶1 seemed to be the most favorable condition for the formation of iron and manganese oxides. With the increase of leaching times, the increase of iron-manganese oxides content slowed down. The content of iron and manganese oxides in different layers of sand columns showed significant difference. The content of oxides in the sub-layer (20～30 cm) was obviously higher than that in the other layers. ③ The correlations between different forms (amorphous form and crystal form) of iron oxides and manganese oxides in various stages (ten leaching times comprising one stage) showed difference, and the ratio of iron and manganese oxides, especially in amorphous form, rose with the increase of leaching times.