The study of sand body architectures is of great significance to the evaluation and prediction of tight reservoir performance. In this paper, sand bodies of the braided river delta plain of the Lower Shihezi Member 8 in the west area of Sulige gas field are taken as the research object, and the differences of sedimentation-diagenesis process of sand bodies with different architectures and their control on physical properties are analyzed by comprehensive use of core, logging and thin section data. According to the spatial distribution characteristics of sand bodies, three types of sand bodies are identified, including stacked type, side connected type and isolated type. Combined with logging curve morphology, the stacked sand bodies are further subdivided into box-shaped stacked type, bell-shaped stacked type and composite stacked type, and the isolated sand bodies into box-shaped isolated type, bell-shaped isolated type and finger-shaped isolated type. Due to the influence of sedimentation-diagenesis, different sand bodies have different physical properties. In the middle of the channel and channel bar, the box-shaped and composite stacked sand bodies are mainly developed, with large vertical thickness and long lateral extensional distance. The hydrodynamic force of these was strong, therefore the particle size is relatively coarse, the content of matrix is low, and the original pores are developed. The quartz and rigid debris of these are developed, therefore the anti-compaction ability is strong, which is conducive to the preservation of original pores that provides space for the flow of organic acid fluid, which is conducive to the development of secondary dissolved pores, so they have good physical properties. In the transitional zone to the channel edge, bell-shaped sand body gradually develops, the grain size becomes smaller, mudstone intercalation develops gradually, and physical properties become poor. Isolated overflow sand body is developed at the edge of channel, with small thickness and short lateral extension distance. It has fine grain size, interbedded contact with mudstone and has undeveloped original pores. It is easy to be affected by fluid discharged from surrounding mudstone by compaction, which form carbonate cementation resulting in tight reservoir.