Magmatic rocks in Ningyang-Wenshang coal mine in Luxi coalfield intruded through strata and roof and floor of coal strata, which will influence coal strata and quality greatly. In this paper, intrusion layers, numbers of intruded layers, intrusion thickness, lithology and mineral composition of magmatic rocks have been analyzed and studied. The origin of magmatic rocks, geological ages and the influences to coal strata and quality have been introduced as well.