Magmatic activity is widespread in sedimentary basins worldwide. As hydrocarbon exploration spreads to igneous rocks, the understanding of the role of igneous complexes in the basin is becomes increasingly important. Basinal igneous tectonics is defined here as the deformations involving igneous complexes，host rocks and overburden resulted from magma intrusion and extrusion. Recently, the study of geometry and emplacement mechanisms of igneous sills by using 3D seismic reflection data has made great achievements, which has started a new ear of igneous tectonic analysis. Interpretation of 3D reflection seismic data offers a novel approach to the understanding of the fundamental aspects and hydrocarbon implications of basinal igneous tectonics. The research of igneous tectonics is one of the key fundamental problems of structural analysis in sedimentary basins, and is of broad practice prospecting in the petroleum exploration. A better understanding of the igneous rocks will improve our understanding of basinal structures and hydrocarbon traps related igneous rocks, and bring a number of new ideas of hydrocarbon exploration.