Abstract: Determination of organosulfur content for macerals in coals accumulated in different environments have been conducted useing microprobe of scanning electronic microscopy.The results shows that there exists distict discrepancy in organosulfur content for centain maceral from different kinds of coals,while the organosulfur contents for macerals in the same coal are also in difference.We have found out that organosulfur content of coal maceral was determinded by sedimental environment and the extents of gelification and oxidation of maceral,amoung which sedimental environment was the main factor.