Abstract: The low grade nickeliferous laterite ore was treated by deep reduction，low-intensity magnetic separation，high-intensity magnetic separation process，during which reducing temperature，reducing time，carbon coefficient，thickness of materisl-bed and the backing amount of concentration from high-intensity magnetic separation was investigated.The optimal condition were the reduction temperature at 1 275 ℃，reduction time for 50 min，carbon coefficient of 2.5，thickness of material-beds of 25 mm，the backing amount of concentration from high-intensity magnetic separation of 25 percent of ore by weight.The nickel-iron products in high quality with nickel and iron grade of 6.96% and 34.74%，nickel and iron recovery of 94.06% and 80.44% respectively was achieved by low-intensity magnetic separation，the intensity of which was 130 kA/m，at the same time，the concentration riched in micro-nickeliron particles from high-intensity magnetic separation has good qualities in nucleator.

Key words: Laterite-nickel ore, Deep reduction, Magnetic separation, Backing amount