Abstract: The control-precision of coal thickness in Permo-Carboniferous coalfields,Shandong,in different exploration stages and different exploration lattice are evaluated by comparing the exploratory thickness with mining confirmed thickness in Xinglongzhuang mine where the single drilling method was adopted,and in Coal Mine No.2 of Jining where the integrated exploration was adopted,along with data statistics from different study areas.it is suggested that in detailed exploration stage under the coal seam stable conditions,the integrated exploration treatment,especially the digital seism for coal seam macroscopic structure control,is enough to basically contirm the coal thickness.The requirement of seismic research is presented.