Based on the high resolution 3D seismic data, seismic attribute and SpecDecomp are used to study the architecture, genesis and process of the Quaternary submarine channels in Muni Basin. There are three main conclusions: 1) model of sedimentary architecture in sinuous submarine channels are built; 2) the evolution processes of submarine channel are summaried; and 3) lithofacies models of sinuous submarine channel are established in this paper. Sinuous submarine channels are composed of migration channel and aggradation channel. Lithofacies model of sinuous submarine channel is an important theoretical significance for accurate reservoir prediction of deepwater turbidity.