Abstract: Rhenium (Re) in a super-high-organic-sulfur (SHOS) coal from Ganhe coalmine,Yanshan Coalfield,Yun-nan,China,is investigated by high resolution inductively coupled plasma mass spectrometry (ICP-MS) and scanning electron microscope equipped with energy dispersive spectrometer (SEM-EDS). Combined with geo-chemical parame-ters of trace elements,the geochemistry and enrichment origin of Re in Ganhe coal are discussed. Compared with the Re average abundance of worldwide hard coals (1 ng / g),the Ganhe coal is remarkably rich in Re (229. 14 ng / g). From the correlation analysis of Re concentrations and ash yields,as well as major elements contents,Re is mainly as-sociated with organic matters,and in No. 4 coal is partly associated with clay. Indicated by Sr / Ba,U / Th,Ni / Co,and Vi / Ni+V,Ganhe coal was deposited under an anoxic reducing condition strong influenced by marine. When the Ganhe coal was invaded by possible submarine exhalation,Re was reduced by organic matter,and then the mobility of Re was decreased,and finally Re was absorbed or complicated by organic matter. The concentrations of Re,together with Co, Ni,Cu,Zn,and Cd in GH12-3 are the highest in Ganhe coal,which may be related with marine microorganism.