With the highspeed development of social and economic development, the assumption and demand of nickel have been kept at high level. Statistic data show that 160 Mt nickel (metal) have been identified in the world, among that the sulfide nickel accounts for 28% of the total reserve while laterite nickel occupies about 72% of the total reserve. As sulfide nickel deposits are characterized by high oregrade, less impurity, easy mining—metallurgy, the nickel from the sulfide nickel deposits occupies 60% of the world total nickel production. With the nickel production increasing dramatically and nickel reserve depleted obviously from the sulfide deposits as well as no more new sulfide deposits being discovered, the exploration and mining of the laterite nickel deposits have attracted domestic and international geologists' attention.The following features for these laterite nickel deposits have been recognized as follows: (1) At present, 115Mt metal nickel from the laterite deposits occurring in various countries (or regions) have been located; (2) The cost for mineral exploration, mining and oredressing is low; (3) The traditional metallurgical methods have been applied to the utilization of the laterite nickel ores, but the high pressure acid leaching (HPAL) and heap leaching (HL) may also be used in metallurgical processes of the laterite nickel ores; (4) Most of these major laterite nickel deposits are located along the equator and close the sea. Therefore, shipment of the laterite ore will be easy. Various ultramafic and mafic igneous rocks, with weathering covers, are widely distributed in southwestern China and Hainan Island.Some laterite nickel deposits or prospects occurring have also been located at top or neighboring regions of some ultramafic rocks. Therefore, attentions have to be paid on the mineral exploration and mining of the laterite nickel deposits occurring in China.