According to test date of coal petrologic test and proximate analysis,this paper provides an overall coal quality in mineable coal seam of Taiyaun formation and Shanxi formation in Fengyangshan mining area. On this basis,the correlation between coal quality of mineable coal seam and coal formation environment was discussed in detail. The results show that the mineable coal seam of Taiyaun formation is lean coal which characterized by low ash yield( air dried basis),low volatile( air dried ash free basis),high sulfer( S_t,d),and that the mineable coal seam of Shanxi formation is lean coal which characterized by low ash yield( air dried basis),low volatile( air dried ash free basis),low sulfer( S_t,d). The ash content of mineable coal seam of Taiyaun formation and Shanxi formation were both low,but Changes of ash yield in Shanxi formation coal seam is obviously larger,and the coal ash composition parameter is higher. The main sulphur components in mineable coal seam of Shanxi formation are S_p,d,S_o,d,which is much lower than the components in coal seam of Taiyuan formation. It builds the coal-forming environment from the bottom up,from neritic facies,transitional facies to continental facies evolution. The Water in peat bog also evolved from salt water,brackish water to fresh water. So the relative coal quality features also showed vertical zonation.