In order to accurately describe the time-space distribution of sedimentary sand bodies in the delta plain of the Shanxi Formation in the Da 47-Da 70 well area of Daniudi gas field, the vertical and plane marks of the single channel sand body in the dense well area were identified and the relationship between thickness and width was analyzed by the core, logging and other data.Using high-quality seismic attribute values as trend surface controls and the thickness of each small layer sand at the well points to obtain the prediction properties with seismic attributes in petrel software. Therefore, it provided guidance for the distribution of sand bodies and sedimentary facies in sparse well area. The results show that the identification marks of the vertical interface of the single channel sand body are mainly argillaceous sedimentary discontinuities and calcareous sedimentary discontinuities.The plane identification marks mainly include inter-channel sedimentation, elevation difference, lateral superposition and "thick-thin-thick". There is a good exponential relationship between the thickness and width of a single sand body. The method for combining root mean square amplitude property with sand thickness at well point can reflect the distribution characteristics of sand bodies. In summary, the identification and characterization of a single sand body is of great significance for the study of sand body and sedimentary facies distribution in the target area.