To study the coal-bearing sedimentary cycle’s origin of microsoft-com:office:smarttags" />Tiefa Basin, the authors research tectonic controlling action on coal-bearing sedimentary cycle. The results show that: 1) under the condition of the accommodation spatial decreasing and the higher depositional filling rate, the interior of basin edge fault alluvial facies and the anterior fan fluvial facies are formed, meanwhile, the latter composes the main body of coal-bearing sedimentary cycle; 2) under the condition of the matching basin edge zone’s accommodation space and sediment volume, after the interior of basin edge fault alluvial fan is formed, few coarse clastic rocks can be moved further, and the large peat swamp gasification area at the anterior part of alluvial fan forms the upper coal seam of coal-bearing sedimentary cycle.