This study aims to sectioning the ranges of different types of tombs of early age of Baekje by topography and examining the existence of politics that matches with the burial style. In terms of chronological changes in burial system, use and settlement of rectangular wooden coffin were considered as an epoch of the early Beakje period. The wood-coffin tomb were generalized burial form at the areas of Hangang, but then again, it can be categorized into five different types by the areas ; the stone mound tombs are in the upper-stream area, the wood-coffin burials are in the mid-stream area, the wood-coffin burial earth-and-stone mound tombs are in the lower reaches of Hangang, the ditched wood-coffin tombs are in the eastern part of inland areas of southern Gyeonggi Province, and the plain wood-coffin tombs are in the western part of Gyeonggi Province’s southern inland. The form of multiple burials which can be found in the earthen mound tombs at the mid-stream area is also found in the stone mound tombs at the upper-stream area, and their origins can be traced back to the northern burial system in Liaoning and Jilin Provinces As for the wood-coffin burial earth-and-stone mound tombs in the lower reaches of Hangang, iron weaponry were found more than doubled quantity then that of the other areas and faceted jade bead, spiral-cut gold earring and long iron swords with bronze guard which were common excavated goods in northern burial tombs were founded. The result of comparative examination of these archaeological evidences with historical analysis of textual sources led to an interpretation of the downstream culture of Hangang as a merge of the Han 韓 culture of Sinbungo State臣?沽國 with the Buyeo-Goguryeo culture of the Biryu沸流 tribe, and that of the midstream area as a merge of Han韓 culture of Baekje State伯濟國 with Buyeo-Goguryeo culture of Onjo溫祚 tribe. On the other hand, the inland area at the southern part of Gyeonggi Province was occupied by the Han韓 tribal groups. Statelets of Mahan馬韓 confederacy are identified to exist in this intermediate area between two groups residing in the middle and downstream areas of Hangang.