The oil and water relationship of low oil-saturated super-heavy oil reservoir is generally complicated. In this kind of reservoir，the study of oil-water distribution rule is the basis for probable reserves evaluation and development.Based on the data of logging，core analysis and development performance，the evaluation of oil-bearing property of reservoir and the oil and water distribution characteristics were studied in Ng6 layer in the east region of Gudao Oilfield，and it is believed that the reservoir is a low oil-saturated reservoir with complicated oil and water relationship. The weak driving forces dominated by gravity and buoyancy are difficult to drain the original water in pores with small throats，which leads to a lower oil saturation of sand bodies in the river edge and river beach with poor physical property. After the accumulation of oil and gas，the intense movement of Gubei Fault make oil density increase to 1.01 g/cm3，and continuous oil column with a certain length is able to make oil overcome capillarity pressure and blow out of pore to gather in low part of the structure and make inversion of oil and water. Directed by reservoir development mechanism based on oil-water distribution characteristics and control factors，the oil-water distribution pattern of Ng6 low oil-saturated super-heavy oil can be divided into four patterns including，lithological controlled patternⅠ，tectonic controlled patternⅡ，tectonic and lithological controlled patternⅢ，and oil-water density differentiation controlled patternⅣ. This research formulates the differentiated development strategy and realizes reserves evaluation and effective utilization.