Using the method of molding, with referring the sediment thickness from the bottom of Carboniferous Shuangfeng limestone to the surface of Ordovician buried hill as the marker, the preCarboniferous karst micro-geomorphology is restored in the west part of Lungu Oilfield. Three 2nd-grade geomorphological units are divided, which include the karst platforms, karst gentle slopes and karst basin from east to west. In the light of the division method of modern karst theory, the 2nd-grade geomorphological units are characterized finely and then eight 3rd-grad micro-geomorphological units are divided in this area. It is concluded that the hydrodynamic circumstance is different in different geomorphologic locations which results in the differentiation among the karst micro-geomorphology, the water drainages and the reservoir filling style. the law and filling of the landscape units in karst reservoir development.