Abstract: The sedimentary systems are explored on the basis of 2D seismic data for the target strata in one block in the Arakan Coast basin, Myanmar developed in the trench-slope basins along the active continental margin. The results of research in this study have disclosed that the sedimentary stsyems in the study area dominantly consist of the littoral-shallow sea, delta, turbidite fan, incised valley, bathyal continental slope and bathyal plain sedimentary systems. The reservoir rocks are mainly developed in the littoral-shallow sea, delta and turbidite fan sedimentary systems. The small-sized trench-slope basins may be host to the medium-or small-sized block oil-gas pools dominated by natural gas.