Abstract: The shallow geological research of Weixi exploration area in Beibu Gulf is of low degree, which is not conducive to further exploration and engineering activities in the future. In this paper, based on the well site survey data and regional research results of predecessors, the engineering geology and sequences of the shallow strata in this area are divided, and the shallow geological structure is preliminarily established. Within the depth of 40 m below the sea floor, the lithology of the strata is silty clay layer, hard clay layer, gravel sandy layer, clay layer and sandy layer from top to bottom, and the formation ages are respectively Holocene and late, middle and early Pleistocene.