As the development of marine resources is recently desired, various kinds of marine structures are built. Of them, the pipeline is highlighted as a very important facility, in that it is used to transport fluids, such as oil or natural gas mined in marine and move information through marine cables.Unlike on earth, the pipeline is affected by many marine external forces, so it should be constructed by fully considering multiple special factors. One of the factors to be considered in terms of stability of pipeline is the scour. Therefore, many scour countermeasures are applied to prevent it on the base plane of pipeline. As the representative scour countermeasure, buried and non-buried method are used. However, such a method is not only limited temporally and spatially, but also results in further maintenance cost.The self-burial type of pipeline is recently developed, which can be buried without a separate scour protection. Such a pipeline is spontaneously buried to secure the stability of it within short period, by attaching the spoiler on top of it and promoting the scour on the base plane. Since this method does not require a special scour protection and spends little maintenance cost, it is advantageous to save time and money.Although the pipeline to which the spoiler is attached has been studied, the self-burial mechanism of it is not yet clearly examined probably due to a little number of studies which are not enough to exactly analyze and stipulate it.Thus, this study reviews effects of flow condition and specifications of the spoiler on the self-burial of pipeline, by using the LES-WASS-2D including the N-S Solver with which flow characteristics around the pipeline can be interpreted with high precision, in order to clearly understand the self-burial mechanism of the pipeline with spoiler.