Based upon 3D seismic fine interpretation of the 4500km2 north slope of Tazhong low uplift, it is divided into four series of fault systems according to the unconformities, growth strata and the contacts of the faults and strata, they are Cambrian-early Ordovician tensional fault systems, late Ordovician thrust compressional fault systems and northwestard slip fault systems, Silurian-Devonian northeastard slip fault systems, and Permian magmatic pierces respectively, among which the Cambrian-early Ordovician tensional fault systems lay foundation for the late tectonic movement. The late Ordovician fault systems converge southeastard and diverge northwestard, and there are obvious zoning and partitioning distribution. It is thrust fault system in the east of Tazhong low uplift and is northwest slip fault system in middle-west. And it can be divided into six series of arched fault belts, every arched fault belt is consisted of several faults. The formation of the late Ordovician fault systems may be the result of the northwestard thrust of the Paleozoic altyn terrain. The Silurian-Devonian slip fault systems are mainly formed in extrusion stress background and spread in northeast direction. The slip fault systems are made up of three parts: the main faults, the tailed en-echelon structures and the fault troughs. The main faults are high-angle approximately upright in seismic section and the the fault troughs are rhombic in plane. The Permian magmatic pierces are distributed in spotty or bandy, and they are mostly developed in the early faults and always superimpose or reform the early faults. The formation of fault system is controlled by tectonic movement, from Cambrian-early Ordovician ancient oceanic tensional cleavage to Silurian-Devonian oceanic closure and the arc-continent or continent-continent collision, the tectonic evolution has formed a relatively integrated Wilson-Cycle, and the Permian magmatic pierces indicate the beginning of another cycle.