Abstract: To assess the impact of imported coal on the domestic environment,the contents of ash,sulfur,mercury,arsenic,fluorine,chlorine and phosphorus in the imported 360 batches Mongolia coals were detected by Atomic Fluorescence Spectrometry( AFS),Direct Mercury Analyzer and Potentiometric titration.The overall level of the seven elements was described by the robust statistics and then evaluated according to the China's coal related grading standards and enrichment factor.The results show that the Mongolia coals contains special low mercury and chlorine,low ash and sulfur,medium fluorine,arsenic and phosphorus.The average enrichment factor of arsenic is 16,which should be payed more attention to the risk of environmental pollution.The relevant analysis and cluster analysis were used to infer the occurrence status of sulfur,mercury,arsenic,fluorine,chlorine and phosphorus.360 batches Mongolia coals can be divided into three different veins sources,and has different characteristics.Comprehensive consideration of correlation analysis and factor analysis results,the main factor features cloud be described as organic arsenic associated factor,fluorine mineral factors( fluorophosphorite and aluminosilicate) and sulfur factor.