By analyzing relevant data of Dacheng coalfield exploration area, the occurrence regularity and influencing factors of the coal was summarized. Among coal coal bearing coefficient variation, Taiyuan group was the largest, central upper center shanxi group, Benxi group smallest, groups from Taiyuan, Shanxi group to Benxi coal accumulating effect from weak to strong, strong by the weak again. From No. 10 coal seam to the No. 5 coal seam coal accumulating center had the inheritance. From bottom to top, the sedimentary environment of coal measures changed from the coastal shelf, coastal shelf to delta environment. The thickness of the same coal seam in the plane change was caused by coal accumulating environment are different.