Tabel depression is a secondary structral unit of the Tamuchage basin, which locates in the east of Mongolia and goes into China northward , and belongs to the identical structral unit with Haila’er basin.Tabel depression is a sedimentary sequence structural unit of region which are constrained by high angle uncomformable surfaces in Early Cretaceous in Tamuchage basin, The strata is divided into 4 third grade and several fourth, fifth grade sequences. The integral exhibits 4 series of Water invasion to dereliction depositional cycle and exists three series of sedimental facies combination including fan delta, lake, fan delta, offshore subsea fan and delta etc. The geologic features of tectonic, climate, palaeogeomorphology sedimentary feeding and lake surface variation etc. rigorously controls the sequence composition and filling response pattern. The various Syngenesis Fracture Integrated Mode and tectonic reference variation obviously acts as redistribution and resedimentation for sandbody concentration. particularly the “λ” or “Z” characters shape fault combination system builds up the angle of rupture rich sandstone model which easily takes shape good trap as benificial prospecting trend. The analysis of tectonic settling process etc. have revealed that the depression has three times evolution cycles of depositon rate variation, and which is divided into three various subside phases including slow speedup phase in Early Crataceous early stage, fast speedup phase in Early Crataceous midrange and fast—slow speedup phase in Early Crataceous late period. The three phases average rate of fall leave each other as 160m/Ma, 205 m/Ma and 120m/Ma. The unequal scale tectonic subside controls the sandbody diserse system unfold in four-dimensional space