The reservoir architecture characterization is an important means to exploit the residual oil in the later stage of development. The braided river sand body is an important oil and gas reservoir. However，due to the complex mechanism of the braided river sedimentation and multiple superimposition patterns of sandbodies，the mode of the inner reservoir architecture is complex and variable. In view of the study of reservoir architecture of braided river，many achievements have been made in geologic outcrop analysis，logging curve interpretation，characterization and analysis using ground penetrating radar and laboratory experiments. According to the analytical hierarchy process（AHP）of reservoir architecture，the main structure of the braided river reservoir was graded into 6 levels of architecture units，among which the 3rd level unit and the 4th level unit were the main objects to be studied focusing on their sedimentary model of single sandbodies，characterization of architecture parameters and development model of inner accretion sandbody of braided river bar and interbed and their architecture parameters. The braided river reservoir architecture are mainly affected by four aspects including tectonic movement，river water energy，climatic conditions and sedimentary datum change.