Shan1 member of Qingyang Gas Field in Ordos Basin is the main production layer, and its sedimentary environment and facies types have been controversial. Different understanding leads to certain differences in sand body correlation patterns and sand body distribution patterns in each sedimentary facies domain, which increases the difficulty of exploration well location deployment. On the basis of previous research results, the author made comprehensive use of seismic, logging, core, seismic, analytical and laboratory data and field outcrop data, and made use of various research methods and methods such as the traceability and overlying characteristics revealed by seismic reflection structure, the lithological grain size and bedding structure revealed by core, the characteristics of logging sedimentary cycles, and the comparison of modern sedimentology. The sedimentary facies of Shan13 strata in this area are discussed, analyzed and described in detail. The results show that the lithology of the study area is mainly medium and coarse sandstone with block, slab and small trough cross-bedding. The logging facies includes both well sections with complete river "binary structure" and incomplete coarse-grained end-member river "binary structure". The former shows meandering river development, while the latter is related to braided river development. The results of particle size analysis show that the main composition of jump particle size indicates that the paleohydrodynamic force is strong. The outcrop data around the study area show that both meander and braided rivers developed, indicating that meander and braided rivers existed at the same time during the deposition period of Shan1 member. Modern satellite photos reveal that the symbiosis and development of meandering rivers and braided rivers are common. Based on the above evidence, it is finally determined that the development facies of Shan13 in the study area are fluvial facies, which are characterized by the coexistence of curved braided rivers. The frequent lateral deposition of meandering rivers, the coexistence of multiple river types in planes, and the multi-stage superposition of vertical channels are the main factors leading to the complexity of sand body distribution and the rapid change of transverse phases.