The Lashuixia Ni-Cu deposit is located in Hualong basic-ultrabasic belt, Qinghai Province. The Lashuixia rock body was altered intensely, mostly mineralized by Ni-Cu sulfides. The major metal minerals include pyrrhotite, chalcopyrite and pentlandite of the magmatic stage, violarite, pyrite and chalcopyrite of the hydrothermal stage, and nickel-bearing kaolinite, nickel-bearing chlorite and malachite of the oxidation stage. The average content of ∑PGE is 2460.46×10^-9. The（Pd＋Pt）/（Os＋Ir＋Ru） ratios（0.40～2.00） are closely related to the deep magma melting. However, because of the hydrothermal alteration, the ratios of Pt/Pd and Pd/Ir are from 0.01 to 2.62 and from 0.91 to 8.77, respectively. The average value of δ³⁴S is 2.24‰, which indicates that S in sulfides was mainly derived from the mantle. On the whole, the ore-forming processes can be divided into magmatic, hydrothermal and oxidation stages.