Trace elements have some special geochemical properties,such as stable chemical properties,high homogenization degree,etc.There are four main coal seams(No.3upper,No.3 lower,No.16,No.17 coal seam) in Daizhuang coalmine.From No.3 upper coal seam to No.17 coal seam,the trace elements in the coal seam increase gradually.The influencing factors on the trace elements' distribution and origin of enrichment such as the coal forming plant,the properties of terrigenous mother rock,environment of sedimentation and others are analyzed;the distribution laws and distribution conditions of trace elements in different coal seams are accurate controlled.