With the increase of Ni demand and decrease of high-grade nickel sulfide resources, the utilization of nickeliferous laterite ores has aroused considerable attention among geologists. On the basis of the mineralogical study, the atmospheric sulfuric acid leaching of the serpentinic nickeliferous laterite ores was carried out, and the optimized conditions were gained, i.e., 1 mol/L of the sulfuric acid concentration, the ratio of liquid and solid of 10, not less than 70℃ of the reaction temperature, about 6 h reaction time and about 65%(-76μm) grinding fineness. The leaching ratios of Ni, Fe and Mg of the nickeliferous laterite ores are 94.4%, 72.1% and 88.64%, respectively. The results achieved by the authors provide the scientific support for the economical utilization of this type of nickeliferous laterite ores.