Sartohay high- Al chromitites in Xinjiang contain no primary platinum group minerals (PGM) and base metal sulfide (BMS) enclaves, which shows the metallogenic magma was depleted in sulphur. The BMS is mainly found in the intergranular cracks, matrix and alteration rim of chromite grains, and the main sulfides are heazlewoodite and millerite, followed by chalcocite, maucherite and arsenopyrite. The PGM occurs in the grains of BMS as inclusions or in the intergranular cracks of chromite grains, and are mainly composed of laurite, followed by erlichmanite, (Os, Ni)S2, stibiopalladinite and few sulfides of Cu, Pt and Au. The whole rock ΣPGE content of chromitites range from 50. 64×10-9 to 92. 00×10-9, lower than worldwide ophiolitic chromitites, and IPGE and Os were more enriched than PPGE and Ir, respectively, the PdN/IrN are between 0. 1 to 0. 9. Major and trace elements of chromitites display the similar geochemical characteristics as the Philippines Acoje high- Al chromitites and spinels in MORB. Based on the type and occurrence of PGM and BMS in the Sartohay chromitites, it is concluded that the origin of chromitits was related to the melt/rock interaction between S- poor tholeiitic magma and peridotite. The euhedral PGM \[e. g. ,(Os,Ni)S2\] and BMS (e. g. ,heazlewoodite ) were formed at the late magmatic stage after the formation of chromiteites, and the Fe- Ni- As- S BMS and PGM were formed in Sartohay chromitits due to the change of temperature and pressure, hydrothermal alteration at the subsequent hydrothermal stage.