Abstract: Sualphur content in main Permo-carboniferous coal seams in western Henan province distribtites high in the west and Iow in the east. while the sea intrusion during the formation of the coal series was from the east and southeast in accordance with the Paleogeographical condition analysis.That has not been found a reasonable explanation for many years Howaver, there had been a great deal of volcanic eruPtion since Papeozoice era to Papozoic era It is those volcanic rock that are zhe main source of the Sulphur in coats in western Henan province.