Abstract: Through systematical research of early to middle Permian basic igneous rocks the focus on the trace element and REE geochemistry, the deposition characteristics, the source of basic igneous rocks and the deep geological process of early to middle Permian Magmatism are put forward. The basic magma originated from homogeneous enriched mantle with relatively intense differentiation. Moving up of magma resulted in fast uplift of upper lithosphere, regional uplift and recession toward west. The lithosphere of Tarim basin was broken up and large scale magmatism occurred while the uplift force exceeded the tortuosity of lithosphere. The Early to Middle Permian magmatism was related to Paleo-Tethys evolution The magmatism in Tarim basin with the Permian magmatism happened in Tarim basin, Turpan-Hami basin and adjacent area, Hongliuhe area, Beishan area and western margin of Yangzhi plate Permian, comprised an intense nmgnmtism belt in the northern margin of PaleoTethys.