Abstract: We studied the correlatian of the hair areenic contents with age sex symptomatic degree from persons exposed arsenic in the area of coal type endemic arsenisn in Anlong county of Guizhou province The results showed that the hair arsenic cnntents of clinical and subclinical endem ic arsenism patents are over 20 tines higher than that of normal control and in the clinical patients their hair arsenic cnntents have an upward tendency according to the serious degrees of their symptoms the male hair arsenic contents in normal persons are obvpusly hgher than the female one but in the persons exposed arsenic there is not this phenoln enon and there is trend of the higher value of the female hair arsenic contents the hair arsenic cnntents in those feanale patients of arsenism icrease with the age which results In the trend of increasing hair arsenic contents with the age In all patients It suggests that the hair arsenic contents have a close re lation to the envi ronm entalpollution of coal acsenil and the obvious increasing of hair arsenic conmtents in thepeople of endeanic area is one of the main charactecistic of the existlng area of coal type endem icarsenism the periodic test of hair suitable to the direct inspect index in the endom icarea;among the residents without clinical symptoms in this area there are probably some subclinical endemic arsenism patients and the hair arsenic contents become much more important indicator for the judament of such kind of subclinical patients.