After a brief discussion on the source, origin and its relationship with tectonic environment of the laoshan granite body, It is presented that: (1) The structure produced in the post magmatism of Laoshan granite body, especially the new structure, is the products of the new activity carrying forward the old structure after the forming of the Jiao-lai basin. (2) There are three fault sets (with trend of N41° E、N20° W & N70°W)in Laoshan granite body.The faults with the trend of N20°W in Jiaolai basin & Laosh...