The Huangshandong intrusion, is located in the centre segment of Tudun—Huangshan—Jing’erquan— Tulaergen mafic—ultramafic rock belt, the northern of the East Tianshan, controlled by the Kangurtag— Huangshan ductile sheer zone, and it is a multiple intrusion and composes of lherzolite, olivine gabbro, gabbro norite, and gabbro diorite. The total concentration of platinumgroup elements (PGE) in rocks and ores is very low, which average value is 2×10-9 and 86×10-9 respectively and it increases with sulfur content increases in ores. Rocks and ores samples have similar mantlenormalized PGE patterns, the fractionation between IPGE and PPGE is low.Diagram of Ni/Cu verses Pd/Ir and petrochemistry reveal that the initial magma of Huangshandong is high MgO tholeiitic magma, which should be undepleted in PGE. Compared with continental tholeiite, simulating result reveals that the parental magma is visibly depleted in PGE, possibly duing to the sulfide presegregation of initial magma in deep crust. The lower Pd/Ir ratio (4.22×10-9～17.24×10-9, 8.49×10-9in average) and higher Ir content (2.04×10-9～21.45×10-9, average 8.79×10-9) in ores suggest that the later hydrothermal alteration in the mineralized process is weak.The platinumgroup elements geochemical character and petrochemical data show that crustal contamination and the fractionation of olivine and pyroxene may be the main factors leading to Ssaturation and sulfide segregation in deep crust.