Carboniferous and Permian sand bodies in Erdos Basin are the chief reservoir for the exploration and ex,lloitation of natural gas. The present paper interprets the dipmeter logging data of three wells and uses them to study the characteristics of palaeocurrents. It is revealed by detailed study that the flow direction of palaeocurrents is not the dip-orientation of the gentle dipping sand bodies obtained from the dipmeter logging out perpendicular to it. This result has solved the problem of how to explain the flow direction of palaeocurrents according to the dipmeter logging data.Calculated results based on the parameters of palaeocurrents indicate that the rivers were braided-meandering ones during the Shihezi to Shanxi period, and were low-sinuosity meandering rivers during the Taiyuan period. The width of sand bodies ranges from 300 to 900m with an average value of 496m. All these are testified by practical sampling in the Zhenchuanbao gas field.This study provides reliable geologic basis for the exploration and exploitation of natural gas in sand bodi’s.