Abstract: Through the anlysis of coal geological exploration and drilling uncovering coal data,using analytical method of gas geological theories and linear regression,the gas occurrence laws in coal seam of Cheji coal mine are analyzed,and the ralationship between gas occurrence in coal seam and geological factors including geological structure,burial depth of coal seam,coal seam thickness igneous rock intrusion and roof and floor lithologic.Comprehensive analysis show that fault,igneous rock intrusion and distribution are key factors affecting the gas occurrence in coal seam of Cheji coal mine No.2₂ coal seam.